题目

人呼出的气体中含量最多的是（） A . 二氧化碳 B . 氧气 C . 氮气 D . 稀有气体 答案：C阅读下面短文, 从短文后各题所给的四个选项(A、B、C、D)中, 选出可以填入空白处的最佳选项。History has some very special qualities about it. It is a 1 of what has happened in the past, and the really interesting thing is that much of history has been 2 time and again. It allows us to learn from the past, both the 3 made and the successes achieved.One of the 4 of history is that it allows us to know how famous people 5 when they were faced with challenges in their life. 6 these challenges happened at a certain time in the past or in a 7 country or culture, all of them can always teach us something 8.Take for example the 9 of Thomas Edison and how many times he 10 while on the road to finally inventing the light bulb (电灯泡). He could be held out as an example of a person who 11 stopped trying. I am sure he was 12by those difficulties but he did not let them stop him. He had a 13 and he just kept trying until he reached success.Or, think about the story of Abraham Lincoln who 14 to become President of the United States even though he suffered 15 losses. Most of us only know about his success. 16, his life was not an easy one. His story makes us keep moving forward no matter what 17 we have in life.These true history stories will make you stop to reconsider 18 or food for thought about going after your dreams even though you may not think you have the courage or the 19 for now to get what you have always wanted. They could help you make decisions and 20 when you have no idea what to do. They could inspire you to be all that you can be.（1）A.note B.belief C.chance D.record （2）A.reported B.expected C.repeated D.corrected （3）A.mistakes B.jokes C.agreements D.challenges （4）A.events B.periods C.problems D.advantages （5）A.studied B.reacted C.competed D.explored （6）A.Although B.Because C.Unless D.Whether （7）A.developed B.poor C.different D.popular （8）A.clear B.simple C.special D.useful （9）A.name B.story C.position D.character （10）A.failed B.watched C.escaped D.traveled （11）A.also B.often C.still D.never （12）A.shocked B.beaten C.discouraged D.controlled （13）A.job B.dream C.duty D.power （14）A.happened B.prepared C.pretended D.managed （15）A.hearing B.weight C.personal D.slight （16）A.In fact B.As usual C.In all D.After all （17）A.directions B.improvements C.permissions D.difficulties （18）A.passing by B.giving up C.setting off D.calming down （19）A.ability B.habit C.goal D.choice （20）A.introductions B.conversations C.judgments D.Impressions