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 cause 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!

(   56._____ have made the earth change a lot.

A.Human beings       B.Animals              C.Plants                D.People in other planets

(  )57.There are _____ kinds of pollution in this passage.

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

(   )58.Pollution isn’t a big problem now, is it?

A.Yes, it is.              B.No, it isn’t.         C.Yes, there is.       D.No, there isn’t.

(   )59.Which sentence is NOT right according to the passage?

A.Most of 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.

(   )60.Which sentence is RIGHT?

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 cause of soil pollution.

1. If the factory keeps on pouring waste water into the river, the river will become very __________.

2. The famous writer is writing a book __________ the environment.

3. We should do something to improve our environment, not to __________ it.

4. There will be a big party at Ann’s house. Would you like to __________ us?

5. I’m __________ of dogs, so I never come near a dog.

6. I joined the Party the day before yesterday, so I’m a __________ of the Party now.

7. Don’t __________ __________ the trees, or the wind will blow the earth away.

8. She has to stay at home, __________ she?

9. We have been __________ Canada four times.

10. It’s not polite to spit in a __________ place.

Hello，everyone．Because of the high rate of school violence(暴力)in some areas，teenagers’safety becomes a serious problem．We are planning to set up an organization named School Watch to make sure that students have a safe school environment．Please be part of our plan!
What is School Watch?
School Watch is a volunteer project in our school．It helps us stop violence and improve the quality of school life．It will keep yourself and your schoolmates safe．The other members of School Watch care for you and your classroom and you do the same for them．
Is it for everyone?
Anybody can become a member of School Watch because everyone has something to offer．
What else can it do?
School Watch makes it possible for us not only to help each other but also to make friends with each other．Some members may offer to help schoolmates who have problems with their homework．
Who is the Best School Watcher?
Our school will look for the Best School Watcher and give him or her lots of prizes．You could be the one!
How do you start?
To be part of this plan，the only thing you need to do is to talk to the director of the plan in your grade．If you want to get more information, check the official website at www.schoolwatch. com．
【小题1】The members of School Watch are probably _______．