The earth is about 4,600 million years old. Modern man has lived on the earth for only 35,000 years, but during that time, we have changed our planet in many ways. Many of the things that we have done are good, but more are not good for the earth.

Water Pollution

A lot of people, birds and fish die each day because of water pollution. Factories have polluted the land and the water. As a result, many rivers and lakes are now dead.

Air Pollution

In big cities, factories, as well as cars, trucks and buses are the main causes of air pollution. Many people in cities now have serious health problems. For example, Mexico city used to be a beautiful sunny capital, but today it is always covered by thick brown clouds.

Soil Pollution

In order to have a good harvest, most of the farmers use chemicals too much in their fields. That’s bad for the soil. But this kind of pollution is difficult to stop.

Hope For The Future

These problems are very serious for our future, so all of us should do something to improve our environment. If we can stop pollution, our planet will become more and more beautiful and our health will be better. Let’s be greener people!

根据短文内容，选择正确答案。

1._____ have made the earth change a lot.

A.Human beings    B.Animals

C.Plants          D.People in other planets

2.There are _____ kinds of pollution in this passage.

A.two B.three C.four D.five

3._____ is a big problem now.

A.Pollution.       B.Population.

C.Education        D.Medical treatment

4.Which sentence is NOT true according to the passage?

A.Most of the things that we have done are good for our planet.

B.We must stop the factories from pouring waste water into the rivers and lakes.

C.Because of water pollution, many rivers and lakes are now dead.

D.Water pollution is very serious nowadays.

5.Which sentence is TRUE?

A.Though Mexico city is always covered by thick brown clouds, it’s still a beautiful sunny capital.

B.Air pollution can make people sick.

C.Now fewer farmers use chemicals in the fields.

D.Factories, cars, trucks and buses are the main causes of soil pollution.

完形填空。（10分）

I can’t remember when I started collecting litter. But it was when I got tired of     litter nearby that I realized no one else was going to pick it up.

I live near a forest in Ohio, America. I can walk there         three minutes. I used to love going there to play with my dog. But one day there was    much litter there that I became very unhappy. I decided to clean up the forest, and I wanted to    happy when I went again. I made my first trip to clean the forest that afternoon. I took a big black rubbish bag with me. Ten minutes     I started to pick up litter, my bag was full! There were cans, bottles, broken glass and newspapers in it.

From then on, I     to the forest four times a year to pick up litter. I often stay there for three hours. It makes me feel      to do something for the environment. After each trip, I look through all the litter that I’ve collected. If      of it is recyclable（可回收利用的）, I’ll keep it. I can’t understand why people drop litter. But I will keep on picking it up     they stop dropping it. I know I am only doing a small bit    the earth, but I still think it is important.

1.A.seeing   B.throwing  C.dropping  D.cleaning

2.A.after   B.for       C.with      D.in

3.A.such    B.very     C.so        D.too

4.A.make    B.feel      C.look      D.find

5.A.after   B.later    C.before    D.of

6.A.had gone B.have gone C.go        D.will go

7.A.tired   B.sad       C.interesting D.great

8.A.many     B.few       C.any       D.much

9.A.until  B.after     C.as soon as D.when

10.A.helped  B.to help   C.help      D.helping

The propgram also provide them _____ job training so that they can live a normal life.

A. of  B.with  C.for   D. To

—It smells terrible. What has happened here?

—Look, there is much waste gas _____ from the chemical factory.

A.pour  B.pouring C.poured D.pours

—Have you finished your homework?

—Not _____. There are still some exercises to be done.

A.already  B.yet   C.just   D.ever

_____ the environment is important for human beings.

A.Take care of B.Taking care of

C.Took care of D.Take the care of

This is the most beautiful park I have _____ visited.

A.ever B.yet   C.never  D.already

Xi’an is a city with many places of interest and __ tourists come here every year.

A.thousand of B.thousand C.thousands D.thousands of

—_____ you _____ your homework yet?

—Yes, I _____ it ten minutes ago.

A.Did; do; finished    B.Have; done; have finished

C.Have; done; finished D.Will; do; finish

It’s necessary for you _____ exercise every day.

A.taking  B.to take C.take  D.takes