根据句意，用所给单词的适当形式填空。
【小题1】You are _____ (waste) the time trying to explain it to him.
【小题2】The exhaust fumes(废气)_____(pollute)our city since five years ago.
【小题3】Our factory _____(produce)ten thousand machines last year.
【小题4】I can’t_____ (bear)you. Please go out!
【小题5】Noise is _____(harm) to our hearing.

   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。
【小题1】_____ have made the earth change a lot.

A．Human beings

B．Animals

C．Plants

D．People in other planets

【小题2】There are _____ kinds of pollution in this passage.

A．two

B．three

C．four

D．five

【小题3】_____ is a big problem now.

A．Pollution.

B．Population.

C．Education

D．Medical treatment

【小题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.

【小题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.

综合填空。根据短文内容，用所给单词的适当形式填空。
loud, live, protect, easy, pollute, waste

Life today is much better. However, there are new problems. One of the biggest ones is how to【小题1】 our environment. Waste water has made rivers dirty. It kills fish and 【小题2】 our drinking water. Noise pollution makes us speak 【小题3】 and become angry more 【小题4】. Air pollution is the most serious. It’s bad for all 【小题5】 things in the world.

—Don’t eat too much candy, because it’s_____ your teeth.   —Oh, I get it. Thank you.

A．harm to

B．good for

C．badly to

D．harmful to

—Have you finished your homework? —Not _____. I_____TV last night.

A．already, have watched	B．yet, watched
C．just, watch	D．ever, watches

—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