Scientists have helped people understand the dangers the earth is facing.As people live on the earth, we should be fully ready to deal with the dangers.If we do not pay more attention to the problems caused by air pollution, our earth may no longer be a healthy place for plants, animals, and people to live.

　　　 Cleaning up the air is a job that all countries must work on.The problems caused by air pollution can be solved, but a lot of work needs to be done.Governments around the world are beginning to work together to lower the levels of dangerous gases in the atmosphere (大气层).If this can be done well, the ozone layer (臭氧层) can rebuild itself, global warming can be controlled, and acid rain can be reduced.

　　　 In 1967, the government of the United States passed the Clean Air Act.More parts were added to the act in 1970, 1977 and 1990.As a result of these laws, cars now must reduce the amounts of harmful gases.Power factories must use “clean coal” methods to reduce acid?rain gases they produce.

　　　 In 1970, the Environmental Protection Agency (EPA) was set up.The EPA's job is to make sure that the environmental laws are being followed and to find out new dangers and offer solutions.The first Earth Day was also ce?lebrated in 1970.

　　　 While it is very important to address with air on a global scale, each person can also do something to protect the earth.Here are some things you can do every day：

(1)Turn down the heat and air conditioning.

(2)Use the dishwasher only when there are full of dishes.

(3)Practice the 3 Rs: recycle, reuse, and reduce.

(4)Plant a tree.

(5)Walk or ride your bike.

(　　)6.If we don't care about ________ problems, our earth may no longer be a healthy place.

A.air pollution B.water pollution

C.noise pollution　 D.sea pollution

(　　)7.Every country should ________ to solve the problems caused by air pollution.

A.rebuild the ozone layer　　　 B.clean up the air

C.produce harmful gases D.reduce acid?rain gases

(　　)8.All the things the EPA can do is to ________.

A.make more laws 　　　　　 　B.find out new dangers

C.protect the environment D.plant trees

(　　)9.The Clean Air Act was passed ________ by the American government.

A.In 1967　 B.In 1970 　C.In 1977 D.In 1978

(　　)10.In our daily life, we can do something to protect the earth by ________.

A.using more cars B.riding the bikes

C.cutting down trees　 D.turning up the heat

根据句意及所给首字母由提示完成单词

1.We have got some juice,　but we haven't got any m　　　.

2.Do you like p　　　?(一种蔬菜)?

3.I don't want to eat t　　　.?

4.Do you like fish or c　　　??

5.Betty doesn't like apples or o　　　.

6.Ford has got four pieces of p　　　.(一种肉类)

完形填空

One evening I went to have dinner with my uncle and aunt. They had 　l invited another person, a young woman, so that there would be four people at 2　 . Her face was familiar (面熟的). I was quite 　3 　that we had met 4 , but I could not 　5 　where I had seen her face. In the course of the talk, however, the young woman 　6 　to tell us that she had lost her purse the other day. All at once I remembered where I had seen her face. She was just the young girl in the photo in the purse I had picked up while walking down the street that afternoon, although she looked much older. She was 　7 　, of course, when I was 　8 　to describe her purse to her. Then I explained (解释) that I had recognized (认出) her from the photo I had found in the purse. My uncle insisted on going to the police station immediately to fetch the purse.

As the policeman handed it 　9 , he said I had found not 　10 　the purse, but the person who had lost it.

　缺词填空。（每空一词）（10分）
　1.　Can you give me some __________(建议) about learning math?
　2.　Kate often feels________(紧张不安的) when she talks to me．
3.　I like history，but I don’t like__________(地理)．
4.　There are many_______(语言)in the world. Most of them aren’t used widely．
　5.　Do you know the________(长)of the Yellow River?
　6.　Do you like your trip? Is it                  (令人愉快的).
　7.　The girl with long hair is the__________(苗条的)of the three．
　8.　Liu Xiang and Yao Ming are both my　h_________．Do you agree with me?
　9.　We don’t know this song very well because it’s　u________.
10.　He is________ (1ike to give money or things to others)to his friends．