Question

In the past, man did not have to think about the protection of his environment. There were not many people on earth, and natural resources seemed to be unlimited.
Today, things are different. The world has become too crowded. We are using up our natural resources too quickly, and at the same time we are polluting our environment with dangerous chemicals. If we continue like this, human life on earth will not survive (继续生存).
Everyone realizes today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing methods, more and more fish are caught. We know that if too many trees are cut down, forests will disappear and nothing will grow on the land. Yet, we continue to use bigger and more powerful machines to cut down more and more trees.
We realize that if rivers are polluted with waste products from factories, we will die. However, in most countries waste products are still put into rivers or into the sea, and there are few laws to stop this.
We know, too, that if the population of the world continues to rise at the present rate, in a few years, there will not be enough food.
What can we do to solve these problems?
If we eat more vegetables and less meat, we will easily get more food. Land that is used to grow crops can feed five times more people than land where animals are kept.
The world population will not rise so quickly if people use modern methods of birth control.
Finally, if we educate people to think about the problems, we shall have a better and cleaner living place in the future.
【小题1】. If we use up our natural resources and go on              our environment, human beings will die out.
【小题2】 If we catch too many fishes from the sea,               will be left.
【小题3】. The world is becoming too                 , so we should use modern methods of
birth control to reduce the population.
【小题4】. Educate people to think about the problems so that the earth will be better and               .
【小题5】. The passage mainly tells us the importance of protecting the environment and
to solve the environmental problems.

Answer 1

【小题1】polluting
【小题2】none
【小题3】crowded
【小题4】cleaner
【小题5】how

解析试题分析： 主要讲述了在过去人们没必要担心环境问题，因为地球上没有这么多的人。现在情况不一样了，环境问题很严重，我们必须面对环境问题。我们要用新的方法来控制人口。
【小题1】细节理解题。根据文章第二段at the same time we are polluting our environment with dangerous chemicals. If we continue like this, human life on earth will not survive可知故用polluting。
【小题2】细节理解题。根据Everyone realizes today that if too many fish are taken from the sea, there will soon be none left. 故用none。
【小题3】细节理解题。根据The world population will not rise so quickly if people use modern methods of birth control. 故用crowded。
【小题4】细节理解题。根据if we educate people to think about the problems, we shall have a better and cleaner living place in the future. 故用cleaner。
【小题5】文章大意理解题。根据这篇文章主要介绍怎样解决环境问题。故用how。
考点：生活类阅读短文。