There were few people on the earth, and natural resources seemed to be unlimited

_1.___Therewere few people on the earth, and natural resources seemed to be unlimited.Today things are different. The world has become too crowded. We are using upour resources too quickly, and at the same time we are polluting ourenvironment with dangerous chemicals _2.__.

Everyone realizes today if too many fish are takenfrom 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 in the land. Yet , we continue touse bigger and more powerful machines to cut down more and more trees. __3.__However, in most countries waste products are still put into rivers or into thesea, and there are few laws to stop this. We know, too , that if the populationof the world continues to rise, in a few years, there will not be enough food.www.zxxk.com

_4._ If we eat more vegetables and less meat, therewill be more food available for everyone. Land that is used to grow crops feedsfive times more people than land where animals are kept. __5._ the worldpopulation will not rise so quickly if people use modern methods of birthcontrol. Finally, if we educate people to think about the problems, we shallhave a better and cleaner planet in the future.

A. What can we do to solve these problems?

B. So we should try our best to protect theenvironment.

C. In the past, man didn’t have to think about theprotection of his environment.

D. We realize that if the rivers are polluted withwaste products from factories, we will die.

E. Why do some people do so foolish things?

F. If we continue to do this, human life won’t survivein the future.

G. Out natural resources will last longer if we learnto recycle them.

试题答案

【答案】

1.C

2.F

3.D

4.A

5.G

【解析】

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