题目内容
What is pollution?
Pollution means a 1 dirty or harmful things to land, air,water and so on. It is bad for animals and plants, and it even makes people's health in d 2 . In our daily life, we can see different kinds of pollution in many places. There are t 3 main forms of pollution ：land pollution, air pollution and water pollution.
Land pollution is caused by solid(固体的) waste, such as cans, bottles and some o 4 things. It makes the environment look very bad. However ， air pollution is more s 5 than land pollution. It is much worse in cities and towns because of the fumes (废气)from traffic and the waste from human activities. When people d 6 their cars ， they produce fumes with C02 ， N02 and S02. The fumes does great h 7 to people's health. And human activities are also the main r 8 for water pollution. In some places ， it has caused the shortage of fresh water.
Different kinds of pollution will c 9 many health problems. People have realized (意识到)they must change this serious situation.
We have only one e 10 . We must try our best to help protect our environment for the future wherever we are
1._______ 2.______ 3.______
4.______5.______ 6.______
7. ______8.______ 9.______ 10______
1. adding 2. danger 3. three 4. other 5. serious 6. drive 7. harm 8. reason
9. cause 10. earth
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