Men have always wondered about the earth they live on and about the ①_____ above them.

    When early men looked at the night sky, they asked themselves a lot of questions. They looked at the moon, and wondered what this strange bright object in the sky was. They did not understand why it changed its shape from night to night. They looked at the stars and planets. They also wondered why some of them changed their positions, while others did not.

    ②他们也思考地球的形状。 Most early people believed the earth was flat.

    ③In different parts of the world, there were different ideas about the universe. The ancient Greeks were the first people to study the universe(宇宙) more scientifically. In the sixth century BC Pythagoras put forward the idea that the world was round. However, he could not explain why people at the bottom of the world did not fall off.

    It was not until the sixteenth and seventeenth centuries that scientists found the answers to some important questions. ④With the help of Galileo's telescope, people could see the sky more clearly, and find the positions of the stars and planets. Finally in 1665, Isaac Newton explained to the world what gravity (重力) was and people at last understood why they did not fall off the earth.

    Our school is on Guangming Street. It's next to the People's Library. There is a park across from our school. The pay phone is between our school and a post office. Our school is very beautiful. There are many trees and flowers in it. If you want to come to our school from the airport, take a taxi and go down Center Avenue. You can see a big restaurant on your right. There is a bridge near the restaurant. Go across it and turn left. Then go down Bridge Street. Turn left at New Park and go down Guangming Street. Our school is across from a bank.

    Mobile phone has become a problem for middle schools. Some middle schools in Australia have banned students from carrying mobile phones during school hours.

    Mobile phone use among children has become a problem for the school this year. Several children have got mobile phones as Christmas gifts, and more students will want them.

    Mary Bluett, an official, said mobile phone's use is a distraction to students during school hours and it also gives teachers so much trouble in their classrooms. Teachers were also saying that sometimes students might use phone messages to cheat during exams.

    She said some schools had tried to ban mobile phones. Some parents felt unhappy because they couldn't get in touch with their children.

    Many teachers said students should not have mobile phones at school, but if there was a good reason, they could leave their phones at school office. They also said there were many reasons why the students should not have mobile phones at school: they were easy to lose and were a distraction（分散注意力） from studies.

    Many people say that they understand why parents would want their children to have phones, but they think schools should let the students know when they can use their mobile phones.

（C）

    ①More and more people like bicycling and it is no surprise. It is fun, healthy and good for the environment. Maybe that's why there are 1.4 billion bicycles and only 400 million cars on roads worldwide today. Bikes can take you almost anywhere, and there is no oil cost!

    Get on a bicycle and ride around your neighbourhood. You may discover something new all around you. Stopping and getting off a bike is easier than stopping and getting out of your car. You can bike to work and benefit(受益) from the enjoyable exercise without polluting the environment. You don't even have to ride all the way.

    ②Folding(折叠) bikes work well for people when they ride the train. Just fold the bike and take it with you. You can do the same on an airplane. A folding bike can be packed in a suitcase. You can also take a common bike with you when you fly. But be sure to look for information by getting on airline websites. ③Not all airlines（航空公司） are bicycle-friendly to travelers.

    Health benefits of bicycling:

    It helps to prevent heart disease.

    Bicycling helps to control your weight.

    A 15-minute bike ride to and from work three times a week burns off five kilos of fat in a year.

    ④________________________________________________ .

    Exercise like bicycling has been shown to make people feel better, more relaxed and self-confident.

    Animals are natural resources that people have wasted all through our history. Animals have been killed for their fur and feathers, for food, for sport, and simply because they were in the way. Thousands of kinds of animals have disappeared from the earth forever. It's a great pity. It is reported that about 170 kinds in the United States alone are considered in danger.

    Therefore, we must take care of the animals around us. Once they are gone, they will never come back again. Animals are more than just beautiful or interesting. They are more than a source of food. Every animal has its importance to nature. Destroying one kind of animal can cause many problems. For example, when farmers kill large numbers of hawks(鹰), their eat rats and mice, with fewer or no hawks to keep down their numbers, rats and mice multiply quickly.

    Luckily, many people have realized this and have begun to do something to protect animals. Some groups put on performances to make people know the importance of protecting animals. Some raise money to help set up more zoos to keep them safe. Some try to get the government to pass laws on protecting the animals in danger. As a result, the number of these animals is growing.

    Information Card

    The Browns and Mary leave the train station for their home. After half an hour, they get to the Browns' home. Mary sees her new home, and she is very happy. She puts her jacket on the bed. Then Mrs. Brown says, "Mary, don't put your dirty jacket on the bed. "

    It's time for lunch. Mary is happy because she sees her favorite food chicken on the table. She tastes it and says, "Very nice. " Then Mr. Brown says, "Mary, you can't eat before your grandparents eat. And you mustn't talk when eating. "

    After lunch, Mary goes into Peter's room. Peter is not happy. He says, "Mary, you can't come into my room without(没有) asking me.

In the evening, the Browns go to bed but Mary doesn't. She is not happy because she thinks there are too many rules at the Browns' home. With her jacket, Mary goes to the train station. She likes it because there're no rules there.