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

完形填空
Time is very important in our lives. But it never had any importance in my life until I 　1　 a watch from my father that made me responsible(有责任). It 　2　 me the importance of time in my life.
I got this gift on a grey-sky day. I had to go to the 　3　 at 9:00 a.m. to pick up（接）my uncle Ali and take him to my father’s house. However, I forgot it 　4　 I was playing with my friends. Later on that day, around 11:00 a.m., I 　5　 my uncle, but I was late for him. He had got out of the plane and 　6　 a taxi to my father’s house.
I　7　 my father’s house at 2:00 p.m. at the same day . My father looked at me angrily. I said “hi” to him and my 　8　 uncle. My father asked me to sit 　9　 him and handed me this watch which was a gift from 　10　. It weighed 8 oz（盎司）and all of it was made of silver（银）. Then he said, “Essa, did you have fun 　11　 your friends today? What you did was not very nice and you should be sorry for your 　12　.” I felt sorry and told my father that I wouldn’t do it again. Then he said, “This watch will be a reminder(提醒物) for you. I hope today you have learned something 　13　.”
I learned a lesson from my father: to respect(尊重) time and 　14　 be late. The watch is important to me, not because of its  15　, but because of the lesson that I learned from it.

完形填空（10分）阅读下列短文，选择可以填入空白处的最佳选项。
Water, it’s a problem for the whole world. A bottle (瓶) of water may not seem like much to us,  1  it can help the people who live in drought-hit (遭受旱灾的) areas in China.
　　In the past few months, many places in southwest China have 2     a serious drought. There has been very little  3 since last autumn. More than 20 million people are 4   trouble finding safe drinking water.
　　After learning about the drought, many people around the country helped by  5   away water, money and other resources (资源) to the people there.
　　Last week, the Young Pioneers and the Communist Youth League in China called on (号召) each student to give one bottle of water to the drought-hit area. In Xi’an, 900 students bought over 1000 bottles of water 6     their pocket money. They also wrote their  7   on the bottles. “I hope you get more rain there. I hope you are happy.”
　　A bottle of water isn’t much, but thousands of bottles will be very  8  . The serious drought has also made students  9  the importance of saving water. One student said, “I have decided to take a shower twice a week  10   every day to save water.”

根据短文内容，从方框内选择合适的单词填空，使短文完整、连贯。

　　best, cause, either, everything, friendship, plenty, take, true, though, with

　　In today's world many people seem to be hungry for money. Money does have its good effect on the poor. But even if a person has already got (1.) of money, it doesn't mean he has got (2.)　

　　If money were everything, all millionaires (百万富翁) would have real love, true 3., good health and a long life. However, this is not always 4..

　　No other three words are more pleasant (令人愉快的) than "I love you". But can love be bought? I'm afraid not. Love means to give, not to (5.. To each person, health and a long life are probably the 6.things. Well, can health and a long life be bought 7.money? Of course not. True friendship can't be bought, 8..

　　As we see around, if money is cared for too much, it can 9.brothers to quarrel, lovers to hate and marriage to end. Even 10.you have much money, it is still not enough to make you a happy person if you have no one to laugh with, no one to cry for.