— She ______________ Shanghai for five months.
—I like it.
—Yes, you_______.
Man has 1 four kinds of satellites. The first kind of satellites studies the 2 of the earth. They are used to make maps. They also help countries to see 3 they can find oil or gold.
The second kind of satellites is used to guide 4 and planes. A ship or a plane can 5 a message to the satellite, and the satellite can find out where it is. The third kind of satellites studies the 6 . These satellites watch clouds and strong winds 7 across the earth. They warn countries to make preparations when very 8 weather is coming. They take photos of the earth from miles above it and send the photos to weather 9 on the ground. The last kind is used for 10 .Telephone calls 11 countries can be sent by these satellites. Some can carry hundreds of 12 at one time. The call is sent to the satellite and then the satellite send it to the station in the country 13 is being phoned. These satellites also carry 14 , they can send about eight programs 15 .
John went to the planet Mars for his holiday. This is his holiday.
Monday
We arrived in the Mars City at 4:30 in the afternoon (Mars time) by a space shuttle. We went to the Mars Hotel (five stars) for dinner before going to bed. I was very tired after the journey (it takes 72 hours to get there) , but I am looking forward to my holiday very much.
Tuesday
I didn't sleep well because of the weightlessness(), the gravity is only about three-eighths of that on Earth. I hit my head on the bedroom ceiling several times. After breakfast we spent the morning on the Mars farm. They don't use earth or chemicals to grow their food. We had lunch on the farm and then had a hoverbus ride over the Mars City. That was very exciting. In the evening we went shopping in the Mars City Shopping Mall. I bought some souvenirs for my family and my friends.
Have you ever thought of living on Mars? Our Earth is becoming more and more c. And at the same time there's terrible p here. If we move to Mars, things will probably change. However, it may be d for people to have a conversation there, because sound doesn't travel very f on Mars. The low pressure(气压) makes it so. For example, as by a human scream on Earth can travel a little over a kilometre. But on Mars, the sound from that same scream will only move 15 metres at m. Besides, the atmosphere on Mars is also much t than that on Earth. On Earth, our atmosphere is about 3 km t, while it is very thin on Mars. Also Earth has a much higher t than Mars. while it is very thin on Marsso, are you r to go to Mars?
—I don't care whether you accept it or not.
—Oh, he is a great man who discovered America.
Children's education is changing very fast today. In the past, teachers made children s quietly for hours. They made them r all kinds of things. The children had to go on r things again and again until they knew them “by heart”. Today, many teachers wonder if it is p to make children learn at all. They say you can o help them learn. They say you must let children learn and discover things for t. But for some of the children, school is a kind of p they can't escape（逃亡） from. They are there only b their parents make them go. They get out of the classroom as soon as the teachers let them leave. Many of them want to find j but the law（法律） will not let them work until they reach a certain（一定的） age. And so, they have to stay in school. O they do not learn anything at all and hate every moment.
