阅读理解。
The earth is our home. We must take care of it. This means keeping the land, air and water clean.
Pollution is a "dirty" word. To pollute means to make things dirty. Pollution comes in many forms. We
see it, smell it and drink it. Pollution is beginning to do harm
( 损害，伤害) to our health, and even to our life.
Man has been polluting the earth from the time he first made his fire9 washed his clothes in the river
and threw his rubbish on the ground. Many years ago, the problem was not so serious because there
were not so many people. All the dirty things would soon be covered up. There was plenty of clean air,
land and water. 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.
Talking about pollution, we once only meant air pollution. It is true that air pollution is still the most
dangerous now, but it is only one kind of pollution.
By using poison ( 毒药), we have polluted the land and killed the animals. By putting dirty water into
river and lakes, we have polluted our drinking water and killed the fish. The rise in population is part of
the problem. More people, more rubbish.
Where is this all to end? Are we turning the world into a big rubbish dump, or is there any hope that
we can get rid of ( 摆脱，除去) pollution? We are glad to say that the public has been warned of the
dangers of pollution and a large number of people are working hard to get rid of it.
根据短文内容判断正（T） 误（F）。
( )1. Taking care of the earth means keeping the land, air and water clean.
( )2. Pollution is bad for our health, and even to our life.
( )3. The problem was not very serious because there were many people many years ago.
( )4. There are many kinds of pollution. Water pollution is the most dangerous.
( )5. Many people have realized the dangers of pollution and are working hard to get rid of it.