完形填空（共10小题；每小题1分，满分10分）
阅读下面短文，掌握其大意，然后从第31至第40小题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
With the development of industry, factories produce large amounts of 31 chemicals. These chemicals go into the atmosphere and flow into the water, making many plants and animals 32 and large areas of the world damaged. 33 , the world’s population 34 to 6.5 billion.
Some people suggest cutting back on production, thinking more about recycling and teaching people about 35 friendly ways of living.
While some people say that a healthy environment and a stable economy should be possible at the same time. They don’t think the economy development is bad for the environment, saying there are many factories and industries 36 control the amount of pollution they produce and spend money 37 any damage they cause. They are concerned 38 the environment.
The way to 39 the environment may be recycling, and making more effective laws to control the numbers of trees 40 and fishes caught. Factories should have to pay higher taxes. And many people are willing to pay higher prices for environmentally friendly things.
31. A. useless B. good C. poisonous D. harmless
32. A. die B. dies C. dying D. died
33. A. In addition B. In all C. In time D. In the end
34. A. is grown B. is growing C. had grown D. grow
35. A. elementary B. environmental C. environmentalist D. environmentally
36. A. where B. which C. what D. who
37. A. repaire B. repaired C. repairing D. to repaire
38. A. with B. about C. in D. to
39. A. damage B. build C. preserve D. ruin
40. A. cut down B. cut off C. cut up D. cut in