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请阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

CHRONOLOGICA

——The Unbelievable Years that Defined History

DID YOU KNOW…

  In 105AD paper was invented in China?

  When Columbus discovered the New World?

  The British Museum opened in 1759?

CHRONOLOGICA is a fascinating journey through time,from the foundation of Rome to the creation of the internet. Along the way are tales of kings and queens,hot air balloons…and monkeys in space.

    Travel through 100 of the most unbelievable years in world history and learn why being a Roman Emperor wasn't always as good as it sounds,how the Hundred Years' War didn't actually last for 100 years and why Spencer Perceval holds a rather unfortunate record.

    CHRONOLOGICA is an informative and entertaining tour into history, beautifully illustrated and full of unbelievable facts. While CHRONOLOGICA tells the stories of famous people in history such as Thomas Edison and Alexander the Great, this book also gives an account of the lives of lesser-known individuals including the exploeer Mungo Park and sculptor Gutzon Borglum.

    This complete but brief historical collection is certain to entertain readers young and old,and guaranteed to present even the biggest history lover with somgthing new!

阅读理解

    When Luke went to university he thought he would be on a new journey in life and getting his own place. In the UK, it's common to fly the nest at a fairly young age. Many choose a flat-share; others make plans to get on the property ladder.

    But the current economic situation forced Luke back to his mum's house at the age of 27. And he's not alone: a quarter of young adults in the UK now live with their parents. The Office for National Statistics said more than 3.3 million adults between the ages of 20 and 34 were living with their parents in 2013.

    Lack of jobs and the high cost of renting accommodation made Luke change his plans. He's upset. "There's something very difficult about being an adult living in an environment where you're still a child," he says. "It limits me socially; sometimes I feel it limits me professionally."

    Indeed, many young people have no choice but to stay at "the hotel of Mum and Dad".

    Krissy had to return home after a year away and now lives in rather terrible conditions, sharing the family's three-bedroom house with her sisters. She says they end up getting on each other's nerves when it's time to use the bathroom in the morning.

    Of course, living with your parents is not unusual in some countries. Economic conditions, culture, or family traditions mean many young people stay at home until they get married. Even then, it can be too expensive to rent or buy a house and the married couples continue to live at one of their parents' homes.

    But some parents seem to enjoy having their kids back at home. Janice's daughters are part of what's being called "the boomerang generation". She says, "I get to share their lives with them, and I've got to know them all as adults. We have the sort of conversations that good friends do."

    So for some it's a win-win situation — spending time with your families, and saving money.

根据短文理解，选择正确答案。

    Hundreds of years ago, news was carried from place to place by people on foot or by horse. It took days, weeks and sometimes months for people to receive news. Now it is possible to send words and pictures around the world in seconds. Billions of people learn about news stories of their own country and all over the world every day, either by watching TV or reading newspapers.

    Newspapers have been an important part of everyday life since the 18th century. Many countries have hundreds of different newspapers. How do newspaper editors decide which news stories to print? Why do they print some stories and not others? What makes a good newspaper story?

    Firstly, it is important to report new stories. TV stations can report news much faster than newspapers. Yet, newspapers give more about the same story. They may also look at the story in another way, or they may print completely different stories to those on TV.

    Secondly, a news story has to be interesting and unusual. People don't want to read stories about everyday life as a result, many stories are about some kind of danger and seem to be "bad" news. For example, newspapers never print stories about planes landing safely, instead they print stories about plane accidents.

    Another factor (因素) is also very important in many news stories. Many people are interested in news in foreign countries, but more prefer to read stories about people, places and events in their own country. So the stories on the front page in Chinese newspapers are usually very different from the ones in British, French and American newspapers.

根据短文内容，选择最佳答案。

    Americans drove more miles in 2015 than any year since the U.S. government started keeping records 45 years ago. The U.S. Department of Transportation (USDT) recently reported that Americans drove a record of 3.148 trillion miles last year. In case you are wondering, that is enough to take 337 round trips from Earth to Pluto.

    There are a number of reasons why Americans are driving more miles. The social experts agree that the first is the price of gas, which has dropped to the level of the year 2004 in the past year. The American Automobile Association (AAA) said that the average price of gas was just $1.71 a gallon. That could be the lowest price since 2004.

    P.J. Sriraj, a director of the Urban Transportation Center at the University of Chicago, notes that the lower cost to fill up a car is just one reason. Another reason is that more Americans are back to work after the 2008 economic recession, and they drive to their jobs.

    Besides, more Americans have to travel a long distance every day between home and the office. There are a lot of Americans who must travel more than 45 miles per day for their jobs. And as for many, there is not enough public transportation.

    Because of the heavy traffic, roads are becoming more and more crowded. While modern cars are more fuel-efficient, the improvement is not enough to offset more cars on the road. “There is no doubt that driving more will make the air dirtier,” said P.J. Sriraj. And many Americans showed a great concern in a recent survey.

根据短文内容，选择最佳答案。

    China dropped its decades-long, one-child policy last year to allow each family to have two children. This change has put 270 million married women of childbearing age in the position of choosing between family and work. The employers also face big challenges as more female workers will have two maternity leaves(产假) for a total of seven to eight months.

    In a survey published by classified advertising website Ganji.com, career women who might be considering having a second child were asked what kinds of pressure they might expect. More than 76 percent of the women who were questioned mentioned concerns about the financial burden of raising two children, while more than 71 percent said it would be difficult to balance career and family. In addition, nearly 56 percent said that having a second child would definitely have a negative effect on their career.

    Another survey conducted by Chongqing-based human resources website job.cq.qq.com found that over 70 percent of job seekers believe that having a second child would make females less popular in the job market, although two-thirds of the employers said the policy will make no difference in their employment of staff.

    Feng Lijuan, s senior expert on human resources at 51 job.com, a leading Chinese job finding platform, said she would not say “there is prejudice against career women.” Feng said Chinese women shoulder more family responsibility. “It is not only about maternity leave; a female employee might only fully get back to work after three to five years after having her first child.”

    Wang Yixin, a senior employment adviser, said the positive side is that more companies are trying to attract more talents by providing support to career women. “Different from before, it is not only employers choosing employees. Many talents, including professional career women, also choose employers.” said Wang. “According to our survey, many large companies are very open to their employees' choice of having a second child.”

阅读理解

    For those who make journeys across the world, the speed of travel today has turned the countries into a series of villages．Distances between them appear no greater to a modern traveler than those which once faced men as they walked from village to village. Jet planes fly people from one end of the earth to the other, allowing them a freedom of movement undreamt of a hundred years ago.

    Yet some people wonder if the revolution in travel has gone too far. A price has been paid, they say, for the conquest (征服) of time and distance. Travel is something to be enjoyed, not endured (忍受).  The boat offers leisure and time enough to appreciate the ever-changing sights and sounds of a journey. A journey by train also has a special charm about it. Lakes and forests and wild, open plains sweeping past your carriage window create a grand view in which time and distance mean nothing. On board a plane, however, there is just the blank blue of the sky filling the narrow window of the airplane. The soft lighting, in-flight films and gentle music make up the only world you know, and the hours progress slowly.

    Then there is the time spent being “processed” at a modern airport. People are conveyed like robots along walkways; baggage is weighed, tickets produced, examined and produced yet again before the passengers move to another waiting area. Journeys by rail and sea take longer, yes, but the hours devoted to being “processed” at departure and arrival in airports are luckily absent. No wonder, then, that the modern high-speed trains are winning back passengers from the airlines.

    Man, however, is now a world traveler and cannot turn his back on the airplane. The working lives of too many people depend upon it; whole new industries have been built around its design and operation. The holiday maker, too, with limited time to spend, patiently endures the busy airports and limited space of the flight to gain those extra hours and even days, relaxing in the sun. speed controls people's lives; time saved, in work or play, is the important thing—or so we are told. Perhaps those first horsemen, riding free across the wild, open plains, were enjoying a better world than the one we know today. They could travel at will, and the clock was not their master.

阅读理解

    According to sociologists(社会学家), every modern industrial society has some form of social stratification(阶层). Class, power and status are important in deciding people's rank in society.

    Class means a person's economic position in society. A commonly used classification is lower class, middle class and upper class. While sociologists disagree on how these terms should be exactly defined, they do describe societies like the United States quite well. One study shows that 53% of Americans belong to the lower class, 46% the middle class, and 1% the upper class. Interestingly, a surgeon earning $500,000 a year and a bus driver earning $50,000 a year both regard themselves as the middle class!

    Power refers to the amount of control a person has over other people. Obviously, people in positions of great power (such as governors) exercise(行使)big power, but people who take orders from others have less power. Power and class do not always go hand in hand, however. For example, the governor of a state has great power, but he or she may not belong to a corresponding (相应的)economic class. Generally, however, there is a relationship between power and class. To our knowledge, there aren't too many people who aren't millionaires in the U．S. Senate!

    Status is the honor or respect attached to a person's position in society. It can also be affected by power and class, but not necessarily so. For example, a university professor may have a high status but not belong to a high social class or have a lot of power over others.

阅读理解

    Recently, we have already shown that climate change has led to a dramatic increase in storm surge risk in New York City, making devastating events like Hurricane Sandy more likely.

    What can we say about the role of climate change in the unprecedented disaster that is unfolding in Houston with Hurricane Harvey? There are certain climate change-related factors that we can, with great confidence, say worsened the flooding.

    Sea Level rise attributable to climate change-some of which is due to coastal subsidence(下沉) caused by human disturbance such as oil drilling-is more than half a foot(15cm) over the past few decades. That means the storm surge was half a foot higher than it would have been just decades ago, meaning far more flooding and destruction.

    In addition to that, sea surface temperatures in the region have risen about 0.5C(close to 1F) over the past few decades from roughly 30C(86F) to 30.5C(87F), which contributed to the very warm sea surface temperatures(30.5-31C, or 87-88F). There is a simple thermodynamic(热力学的) relationship known as the Clausius-Clapeyron equation that tells us there is a roughly 3% increase in average atmospheric moisture content for each 0.5C of warming. Sea surface temperatures in the area where Harvey intensified were 0.5-1C warmer than current-day average temperatures, which translates to 1-1.5C warmer than “average” temperatures a few decades ago. That means 3-5% more moisture(水分) in the atmosphere. That large amount of moisture creates the potential for much greater rainfalls and greater flooding. The combination of coastal flooding and heavy rainfall is responsible for the devastating flooding that Houston is experiencing.

    Not only are the surface waters of the Gulf of Mexico unusually warm right now, but there is a deep layer of warm water that Harvey was able to feed upon when it intensified at near record pace as it neared the coast. Human-caused warming is penetrating down into the ocean. It's creating deeper layers of warm water in the Gulf and elsewhere. Harvey was almost certainly more intense than it would have been in the absence of human-caused warming, which means stronger winds, more wind damage and a larger storm surge.

    Finally, the more tenuous but potentially relevant climate factors: part of what has made Harvey such a devastating(毁灭性的) storm is the way it has stalled near the coast. It continues to strike Houston and surrounding regions with a seemingly endless flood, which will likely top out at nearly 4ft(1.22m) of rainfall over a days-long period before it is done. The stalling is due to very weak prevailing winds, which are failing to steer the storm off to sea, allowing it to spin around and wobble back and forth. This pattern, in turn, is associated with a greatly expanded subtropical high pressure system over much of the US at the moment, with the jet stream pushed well to the north. This pattern of subtropical expansion is predicted in model simulations of human-caused climate change. More tenuous(微弱的), but possibly relevant still, is the fact that very persistent, nearly “stationary” summer weather patterns of this sort, where weather anomalies(both high-pressure dry hot regions and low-pressure stormy/rainy regions) stay locked in place for many days at a time, appears to be favoured by human-caused climate change.

    In conclusion, while we cannot say climate change “caused” Hurricane Harvey, what we can say is that it exacerbated several characteristics of the storm in a way that greatly increased the risk of damage and loss of life. Climate change worsened the impact of Hurricane Harvey.

阅读理解

    Mike Miles hadn't had a stable job in years. He bounced around from one position to another, never sure when his last day would be. Sometimes, he lost a position with less than a day's notice. This wasn't due to a poor work ethic—from arriving early to staying late, Miles says he did everything he could to build a good relationship with employers. But because Miles had a criminal record, he was always cut loose when it came time to let staff go.

    It wasn't until October 2015, nearly a decade after his release from prison, that a cousin told Miles about Lancaster Food Company, a local business that focuses on hiring people released from prison. Hoping this would clear up what felt like a thick cloud of uncertainty over his future, Miles submitted an application. He got an interview, and he then began a new job.

    Miles' scenario is rare in Lancaster, where the poverty rate holds steady at 30%. This figure riled Charlie Crystle,  Lancaster's co-founder and CEO. Crystle was raised in Lancaster but left in 1986 to purse a college degree and later, a career in technology. He co-founded four tech companies, one of which sold for millions of dollars back in 2000.

    Crystle is skeptical that many of Lancaster's low-income residents can get started the way he did. He believes food production is a key way to meet former offenders who may lack a college degree. Lancaster produces products like bread. Nowadays the company is rapidly expanding; however, at just 16 full-time employees, including administration and owners, it doesn't lower the city's poverty rate.

    Crystle says he wants to inspire other companies to rethink their current practices and start conversations around minimum wage and employment opportunities for everyone, including ex-offenders. Dan Jurman, who chairs the city's Commission to Combat Poverty, believes that Crystle's business is a great way to make this happen. "None of us can handle these issues alone, " he said.

阅读理解

Hobbies Help Cure Addiction to the Internet

    While some parents have expressed concerns about the amount of time their children spent surfing the Internet during the summer break from school, it wasn't a problem for Yin Qiming.

    Instead, the 37-year-old Shanghai resident and his daughter divided their vacation between cyberspace and the 8-year-old's other interests.

    “My daughter has many hobbies and I and her mother respect her choices, so we accompany her to classes she enjoys, such as learning to play the drums and drawing,” he said.

    “She loves to play outside with her friends, so she doesn't think the Internet is a must-have thing in her life.”

    Yin added that he rarely imposes a time limit on his daughter's online activity.

    “She sometimes uses WeChat (a popular instant-messaging tool) on my mobile phone, but only to contact her mother,” he said. “Once she has her own plans every day and realizes that the internet is just a part of life, she won't become addicted to it.”

    Li Lin, a primary school teacher from Liaoning province, expressed a similar opinion.

    “We do some homework online, including reciting stories, and the children use the Internet frequently every day of their lives,” she said, noting that the children's online activity is limited to 30 minutes a day at school.

    “We should make better use of the Internet to provide children with more knowledge and help them to grow up,” said Li, who has a 10-year-old son.

    The key to preventing children, especially those at primary and middle schools, from becoming addicted to the Internet is to limit the time they spend online and to ensure that they know cyberspace cannot replace traditional forms of communication, she said.

    Mao Feizhu, a psychologist from Fujian province in southeast China, said people overestimate the influence of the internet.

    “Many people, even some parents, believe the Internet plays a big role in our daily lives, and many things can be completed online, but that's not completely right,” she said.

    “We can use social applications to talk or play basketball games, and even share what we are thinking about, but sometimes it's impossible for our emotions to be accurately reflected in this way. What children need is emotional communication and real physical exercise. After all, love cannot be bought on the net,” she said.

    Perhaps, the best way to stop young netizens spending too much time online is to encourage their other interests but also accompany them when they go online: “We should use the Internet, not become its slaves.

阅读理解

Wilderness

    "In wilderness(荒野) is the preservation of the world." This is a famous saying from a writer regarded as one of the fathers of environmentalism. The frequency with which it is borrowed mirrors a heated debate on environmental protection: whether to place wilderness at the heart of what is to be preserved. 

    As John Sauven of Greenpeace UK points out, there is a strong appeal in images of the wild, the untouched; more than anything else, they speak of the nature that many people value most dearly. The urge to leave the subject of such images untouched is strong, and the danger exploitation(开发) brings to such landscapes(景观) is real. Some of these wildernesses also perform functions that humans need—the rainforests, for example, store carbon in vast quantities. To Mr.Sauven, these "ecosystem services" far outweigh the gains from exploitation.

    Lee Lane, a visiting fellow at the Hudson Institute, takes the opposing view. He acknowledges that wildernesses do provide useful services, such as water conservation. But that is not, he argues, a reason to avoid all human presence, or indeed commercial and industrial exploitation. There are ever more people on the Earth, and they reasonably and rightfully want to have better lives, rather than merely struggle for survival. While the ways of using resources have improved, there is still a growing need for raw materials, and some wildernesses contain them in abundance. If they can be tapped without reducing the services those wildernesses provide, the argument goes, there is no further reason not to do so. Being untouched is not, in itself, a characteristic worth valuing above all others.

    I look forwards to seeing these views taken further, and to their being challenged by the other participants. One challenge that suggests itself to me is that both cases need to take on the question of spiritual value a little more directly. And there is a practical question as to whether wildernesses can be exploited without harm.

    This is a topic that calls for not only free expression of feelings, but also the guidance of reason. What position wilderness should enjoy in the preservation of the world obviously deserves much more serious thinking.

阅读理解

Why Mars (火星) is New Settlement

    Is it possible to live on other planets? The United States government is taking a serious look at the moon and Mars as potential places for future human settlement. The moon could serve as a training ground for later journeys to Mars. Currently, with Mars becoming the eventual long-term goal, serious questions exist as to whether the dangers of the settlement on the moon are too extreme and unnecessary.

    One major reason the settlement on the moon is too dangerous is the difference between the atmosphere environment of the moon and Mars. Atmosphere is important because it protects humans and all other life from a continuous attack of radiation (辐射) caused by sources such as the sun. This radiation is especially dangerous to humans because it increases the risk of cancer and can negatively change DNA. The fact that the moon has no atmosphere can cause great harm to human beings. Although Mars' atmosphere is significantly thinner than Earth's, at least it has one and would create some sort of protective barrier for humans.

    Another important characteristic necessary for human settlement is natural resources like water, of which the moon is believed to have none. Mars, however, contains vast quantities of water ice, dry ice, and also snow. There is also sufficient evidence that water once existed at the surface of Mars and might return in the future if the planet warms. With increased technologies, the potential for settlers to remain on Mars by being increasingly self-sufficient makes Mars a much more attractive goal as the space settlement than the moon.

    Future settlers will not only benefit from potential water on Mars; the planet is also rich in other natural resources such as oxygen, hydrogen, and minerals, which can be well used in productive ways.  For example, hydrogen can be used as fuel, and it can be combined with nitrogen (氮气) to form new materials necessary for human settlement. Due to these advantages,

    Mars would be a more successful planet for exploration and settlement because it contains the basic resources necessary for humans to survive.

    Since the environment of Mars is more similar to that of Earth and it contains resources necessary to  help  life  exist,  it should  be  the  only option  for  any kind  of  long-term human settlement. The settlement on Mars would not only be a milestone in space but also an excellent chance for mankind to improve itself from past adventures on Earth and preserve and make the best use of the natural resources Mars has to offer.

阅读下面短文，从各题所给的A、B、C、D四个选项中选出最佳选项。

    Imagine looking at yourself in the mirror; you do not look like these stick -thin models seen across the media. Your legs are too big, your bottom is too small, and you are too pale. You are too “ugly” You stare in wonder and anger, “Why don't I look like them?" However, you don't need to imagine this situation, because this is a bitter truth for millions of people. In the media，one can quickly see the ideal body, the ideal face, and the ideal person. The advancement of unrealistic beauty on social media causes millions of people to become dissatisfied with their looks.

    Dissatisfaction with one's appearance can cause dangerous behaviors like dieting, which result in eating disorders like Anorexia Nervosa (神经性厌食症) and Bulimia Nervosa (神经性易饿病). Eating disorders have seen a dramatic increase following the rise of social media, 119% increase according to recent statistics. According to Brittany Tackett, a mental health professional,“30% -50% of patients in eating disorder hospitals used social media as a means of supporting their eating disorders.”

    Not only can social media become a support-system for unhealthy behaviors, but an article written by Rachel Simmons, a Time magazine writer, suggests that people who spend more time online tend to link their self-worth to their looks. A study conducted by Park Nicollet Melrose Center also says that in the 1990's, fifty-percent of women wanted to lose weight. Now it finds that eighty-percent of women want to lose weight. Although this higher percentage cannot be directly related to the rise of social media, one can argue that the unrealistic and damaging beauty expectations that social media presents contribute to this number.

    In addition, social media causes stress. A survey was conducted in which people were asked whether or not they used social media, and how stressed they felt they were. The study found that “social network users are, in fact, 14 percent more likely than non-users to characterize their lives as at least 'somewhat stressful.' Non-users are 28 percent more likely than users to say their lives are 'not at all' stressful”. Additionally, stress may have more connection to self-confidence than is believed.

    So，there you are again, standing in front of the mirror criticizing the parts of your body which do not follow the idealistic images of models seen on social media. Your legs are too big, your bottom is too small, and you are too pale. You are too “ugly”. Although this time, you realize it is not you who are the problem. The problem is the unhealthy and unrealistic standards that social media encourages. So the next time you are looking through Instagram, opening WeChat, or commenting on Twitter, ask yourself, “Is it worth it?”

阅读理解

    Over the years Lisa urged her sister Helen to prepare for her old age. Now they passed sixty. Lisa had a big house, Helen had the clothes on her back.

    Lisa had hated being a child and couldn't wait to grow up and buy herself everything. What Helen wanted was to go outside and play.

    When anyone would hire her, Lisa put herself to work. She never touched a penny of her money though her young mouth watered for ice cream and candy. When the dimes (一角硬币) added up to dollars， she lost her taste for sweets. And her bankbook became her most precious possession.

    Helen had a boyfriend Harry whose only ambition was to play a horn. That Helen married Harry straight out of high school was not surprising. Two or three times Lisa was halfway persuaded, but to give up a job that paid well for a homemaking job that paid nothing was a risk she was unable to take.

    Helen's married life was nothing for Lisa to envy. She and Harry played in second-rate bands. But Lisa had a big house because her boss offered her his first house at a price so low that it would be like losing money to refuse.

    Harry died abroad, in a third-rate hotel, with Helen crying as hard as if he had left her a fortune. He had left her nothing but his horn. Lisa knew she would have to bring her home.

    At dinner, Helen began to tell stories. They were rich with places and people, most of them lowly, all of them magnificent. Her face showed the joys and sorrows.

    Then Lisa knew why Helen didn't mention the shining room. Tonight Helen saw only what she had come seeking, a place in her sister's home and heart.

    She said, “That's enough about me. How have the years used you?” “I didn't use them,” said Lisa regretfully. “I saved for them but forgot to enjoy them. Now it's too near the end to try. ”Helen said, “Don't count the years that are left to us. At our time of life it's the days that count. You've too much catching up to do to waste a minute of a waking hour feeling sorry for yourself.” Lisa smiled.

阅读理解

    Depression(抑郁) can be a destructive illness, plaguing millions of people worldwide with feelings of sadness, hopelessness, and fatigue. Despite numerous antidepressant drugs, as many as a third of patients don't respond to medication. This has forced doctors to be more creative in finding different treatments for the condition.

    In the past two decades, researchers have tied depression to a seemingly unrelated condition: inflammation(炎症), the body's natural response to stress. It could rise from injury or inflection, or even emotional issues like an unhappy marriage or problems at work. Some amount of inflammation is generally beneficial, as it increases production of cytokines(致癌因子)，proteins that help us heal and protect us from the effects of overwork.

    But excessive cytokine levels, and the inflammation they bring on, could come at a cost—a number of studies suggests that high levels of cytokines could contribute to depression.

    Cytokines can reach the brain several ways: directly through the blood-brain barrier or indirectly by binding to nerve fibers elsewhere, which send signals to the brain to produce the inflammation molecules. In the brain, cytokines can disturb the production and release of several important signaling chemicals, including serotonin, dopamine and glutamate, which help control emotion, appetite, sleep, learning and memory. It's though that a lack of serotonin activity in the brain causes depression; most antidepressants increase the activity. But cytokines also have been shown to activate stress hormone signaling in the brain, which man also serve to develop depression.

    With all the evidence implicating inflammation in depression, doctors have been anxious to test anti-inflammatory drugs as a potential treatment. Four small studies published between 2006 and 2017 by research groups in Europe and Iran found that adults diagnosed with depression who took aspirin or another anti-inflammatory drug called Celecoxib, along with an antidepressant, got more relief from feelings of sadness, hopelessness, guilt and fatigue compared with those taking an antidepressant alone. However, Andrew Miller, a professor of psychiatry at Emory University, thought something was wrong in these small, limited studies. None of them looked at whether the participants had to have high levels of cytokines before they'd see a benefit from anti-inflammatory drugs.  "Unfortunately, much of the field has fallen into the trap of viewing inflammation as the be-all, end-all," Miller says. He and his colleagues wanted to see whether the effect of these drugs was limited to the depression patients with high cytokine levels, or if it helped all people diagnosed with depression.

阅读短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。

    It's best to plan ahead and there is no better way than to prepare for an emergency before it happens. For example, the time to plan for a fire emergency is before it happens. This is when everyone is calm and clear-thinking. This is when decisions about safe escape routes can be discussed and made. Have a family talk. Don't delay. Planning won't help after a fire starts.

    Knowing ahead of time how to get out during a fire can save needed seconds. The best way out in a fire is the route you use to go in and out every day. Yet, in a fire this route may be blocked. Be sure to plan other escape routes.

    Take each person to his or her room and describe what to do in case of fire. Give everyone a job. Older children should take care of younger ones. Plans may have to be made for anyone who cannot escape without help. Adults who can't walk should sleep on the first floor. Small children should sleep near older persons who can help them. Only healthy, able persons should sleep in hard-to-reach places such as attics or basements.

    Practice your escape plan at night when it is dark. Be sure that your plan is good and will work. For example, make sure that a child can actually open the window he is supposed to use for his escape. Teach children to close their bedroom doors. Tell them to wait by an open window until someone can reach them from outside. If an adult cannot be wakened, children should understand that they must leave by themselves.

    Choose a meeting place outside. This way you can tell if everyone is safely out of the building. Know where nearby telephones or fire alarm boxes are found.

    If you live in an apartment, try to get everyone out. Learn where the fire alarm is in the building. Your family should know what the fire alarm bell sounds like. They should know what to do when they hear it. Try to get the other families in your building together to have fire drills. Write down the telephone number of the fire department. Stick the number to each phone.

    Early warning is the key to a safe escape. It has been shown time and time again that a family can escape if warned early enough.

阅读理解

    When you go to St. Petersburg, the number of attractions can seem overwhelming. If you're short on time, or just want to make sure to hit the highlights, these are the top must-see sights in St. Petersburg.

    The Hermitage Museum

    The Hermitage Museum is one of the most important sights to see for any visitor to St. Petersburg. There you can see lots of different paintings of old masters inside the Hermitage. Prepare to come face-to-face with classic Western artists.

    The Russian Museum

    The Russian Museum holds one of the largest collections of Russian art in the world. View Russian art creations through the ages, from Byzantine (拜占庭)-style icons to the Socialist Realism of Stalin's times.

    Kizhi Island

    Kizhi Island is an open-air museum of wooden buildings from the Karelia Region of Russia. These impressive structures are made without any nails (钉子) — the wood fits together with joints and grooves (沟槽).

    Peterhof

    Peterhof is as beautiful as it is fun. You'll be charged for admission (门票), but go to Peterhof when the fountains (喷泉) are working — during the day in the summer. They are shut off in winter as well as in the evenings.

    The Church of Our Savior on Spilled Blood

    Love it or hate it, the Church of Our Savior on Spilled Blood is an attractive must-see sight. The beautiful look may make your eyes brighten, and the paintings inside the church will make you say "Wow!"

    The Bronze Horseman Statue

    The Bronze Horseman is a part of Russian Culture and a symbol of St. Petersburg. Made famous by Alexander Pushkin (普希金), this statue of Peter the Great sitting on his horse can truly show Peter the Great's influence on the Russian idea of greatness.

阅读理解

    O'Brien and Samantha Kassirer from the Northwestern University Kellogg School of Management conducted two experiments to determine the levels of people's happiness when they gave away money or when they spent it on themselves.

    The first experiment involved 96 college students receiving $5 every day for five days. They had to spend the money on the same thing each day. Researchers randomly asked the participants to either spend the money on themselves or give it to someone else, like through a tip or an online donation to charity. The participants ended each day by reflecting on their spending experience and their overall level of happiness. Regardless of how they spent the money, everyone started off with roughly the same level of self-reported happiness. Those who spent the money on themselves, however, experienced a decline in happiness over the five-day period. The people who gave the money to someone else maintained their happiness levels.

    A second experiment, this one conducted online, involved 502 people playing 10 rounds of a word puzzle game. Each round the player won, they received 5 cents. The participants could either keep the 5 cents or donate it to a charity. After each round, people rated the level of happiness they felt after winning a round. As with the first study, those who gave away the money reported a longer stretch of happiness than those who kept the money for themselves.

    As for why people who used the money for themselves aren't as happy as long, the researchers explain that focusing on an outcome — like getting paid — can diminish (削弱) the experience. When people focused on an action — like giving to charity — they concentrate more on the act itself as a joyful event, explaining why happiness stayed more consistent among those who spent the money on others. "If you want to sustain happiness over time, our new research shows that repeated giving, even in the same way to the same people, may make you continue to feel much fresher and more enjoyable," Ed O'Brien said.

    So the next time you think about spending on yourself, maybe give it to someone in need instead. Your happiness will thank you.

阅读理解

When we go out traveling, we need either a map or GPS to point us in the right direction. But bumblebees(大黄蜂) have neither of these things, yet they still know the best route. Why is that?

It turns out that these hard-working little bees try many possible passages before picking out the best one and remembering it the next time they journey out. They learn from “trial and error”, according to a study by scientists from the University of London.

We use it all the time in our daily lives—trial and error is a helpful problem-solving method. It is the basic concept of “learning from your mistakes”. Most of the time, we fail on our first try, so we analyze the failure, make adjustments and try again. After repeating this a few times, we finally get things right.

This might sound a bit tiring, but it's certainly effective and it works for bumblebees.

In the study, scientists set up five artificial flowers in a field. Each one of them was fitted with motion-triggered(运动触发的) cameras and had landing platforms with drops of sugar in the middle to attract the bees.

At first, scientists noticed the bees' flying routes were long and complex. But after they gained enough experience, they gradually got to their destination quicker. Every time a bee tried a new route that was shorter than the route it had tried before, it was likely to use it again. Otherwise the new route would simply be given up and another one was tested.

“The speed at which they learn through trial and error is quite extraordinary for bumblebees, as this complex behavior was thought to be one that only larger-brained animals have,” Professor Lars Chittka, leader of the study, told Sciencedaily.com.

In fact, the smart bumblebees don't try every possible route. Normally, they would only try about 20 out of the 120 possible routes to visit the flowers.

More interestingly, scientists found that if they removed a flower, bees would continue looking at that location, even if it has been empty for a long time. “It seems bees don't easily forget a fruitful flower,” Chittka said.

Choose the one that fits best according to the information given in the passage you have just read.

P₁Some people have lot of hair while others have a little. Some people have no hair on the top of their head; they are bald. The important thing is -- are you happy with the hair you have?

P₂Problem hair is often a result of an unhealthy diet and lifestyle.

P₃To ensure your hair looks its best, pay attention to what you eat. Lack of protein and iron makes your hair less shiny. So, you need adequate amounts of green vegetables, fruits and dairy products. Drink eight to ten glasses of water a day. This will help keep your hair from becoming dry. Avoid eating sweets or high-fat foods. They can slow hair growth.

P₄Stress in your life can also secretly rob your hair of its shiny beauty. Relaxing music and more rest are both remedies for stress.

P₅In addition, remember to rinse your hair thoroughly after you shampoo it. Brushing your hair regularly will help it grow. It will also make it look healthy. Do not rub your hair too quickly when you dry it. It could damage your hair.

P₆Last, be sure to choose the right hair products. The choices you make are they key to healthy hair.