题目内容：

The world itself is becoming much smaller by using modern traffic and modern communication means (通讯设备). Life today is much easier than it was hundreds of years ago, but it has brought new problems. One of the biggest problems is pollution. To pollute means to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it.

Man has been polluting the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many people. When the land was used up or the river was dirty in one place, man moved to another place. But this is not helpful. Man is now slowly polluting the whole world.

Air pollution is still the most serious. It’s bad for all living things in the world, but it is not the only one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us angry more easily.

Many countries are making rules to fight pollution. They stop people from burning coal(煤)in houses and factories in the city, and from putting dirty smoke into the air. Pollution by SO2 is now the most dangerous kind of air pollution. It is caused(引起)by heavy traffic. We are sure that if there are fewer people driving, there will be less air pollution.

The earth is our home. We must take care of it. That means keeping the land, water and air clean. Also, we must take care of the rise in pollution at the same time.

1.________, our world is becoming much smaller.

A. Because of the rise in pollution

B. Because of modern traffic and modern communication means

C. Because the earth is being polluted day and night

D. Because the earth is blown away by the wind every year

2.Hundreds of years ago, life was ________it is today.

A. much easier than   B. as easy as

C. much harder than D. as hard as

3.The writer thinks that        pollution makes us angry more easily.

A. air             B. noise      C. rubbish           D. water

4.According to the passage, which statement is true?

A. The more people, the less pollution.

B. Air pollution is the only one kind of pollution.

C. If there are fewer people driving, there will be less air pollution.

D. We should not use modern traffic and modern communication any more.