阅读短文，然后按要求完成各题。

　　The world itself is becoming much smaller by using modern traffic and modern communication means．Li e today is(A)________ easier than it was hundreds of years ago．But it has brought new problems．One of the biggest is pollution．To pollute means to make things(B)________．Pollution comes in many ways．(C)我们能看到它，闻到它，喝到它，甚至听到它。

　　Man has been polluting the earth．The more people,(D)________　________ pollution．Many years ago, the problems was not so serious because there were not so many people．When the land was used up or the river was dirty in a place, men moved to another place．But this is no longer true．Man is now slowly polluting the whole world．

　　Air pollution is still the most serious．It's bad to all living things in the world, but it is not only one kind of pollution．Water pollution kills our fish and pollutes our drinking water．Noise pollution makes us become angry more easily．Many countries are making rules to fight pollution．They(E)stop the people from burning coal in houses and factories in the city, and from blowing dirty smoke into the air．

　　The pollution of SO₂ is now the most dangerous problem of air pollution．It is caused by heavy traffic．It is 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．And we must keep careful of the rise in pollution at the same time．

1．将(A)和(B)处填入一个适当的英语单词：________　________

2．将画线部分(C)译成英语：_________________

3．在(D)处填入两个适当的英语单词：________　________

4．将画线部分(E)改为：________ people ________ burning coal in houses and factories in the city．

5．在文中找出最能解释主题的语句：________