Question

 Ecology (生态学) is the science of how living creatures and plants exist together and depend on each other and on the local environment. Where an en?vironment is undisturbed,the ecology of the area is 1        in nature balance,but if a creature dies out or a new species is 2       ,then the ecology of the ar?ea will be upset. In other 3       ,the balance of nature will be 4       .

  Man is a part of the 5        and has done more to upset the ecology during 6        short span on earth than 7        other living creature. He has done this by his ignorance,his 8      ,his thoughtless foolishness and his uncontrolled wastefulness.

  He has poisoned the 9        and polluted both land and water. He has wasted the earth's natural 10        with no thought for the future,and has thought out the most devastating (毁灭) ways of killing his fellow men and every other sort of life at the same time.

  Since man has done so much damage,it is up to man to try to 11        the way he acts if it is not already too 12        If there is to be any remedy (补救法) for our ills,that remedy ultimately lies in the hands of the 13       ,and the sooner they start doing something about it,the 14       .

  One of the main 15        of the earth's troubles is that the world is too 16        and that this overpopulation is growing at an evei^increasing rate. At the same time we are 17        up our natural resources―fuels and mineral ores―at an everincreasing rate with no 18        of replacing them.

  For many years the earth has been unable to 19        enough food for these rapidly expanding populations and the position has been steadily getting worse 20        some of our richest soil was lost and vast areas that were once fertile lands were turned into deserts.

1. A. kept   B. stopped   C. finished   D. lost

2. A. found out   B. brought in

  C. broken down   D. took out ,

3. A. cases   B. speeches   C. ways   D. words

4. A. changed   B. troubled   C. kept   D. damaged

5. A. environment   B. situation   C. science   D. condition

6. A. their   B. one's   C. one   D. his

7. A. any   B. an   C. all   D. most

8. A. greed   B. hope   C. fear   D. desire

9. A. sky   B. heaven   C. air   D. space

10. A. energy   B. resources   C. sources   D. power

11. A. correct   B. right

  C. back   D. forward

12. A. late   B. soon   C. long   D. distant

13. A. old   B. adults   C. young   D. future

14. A. better   B. best

  C. quicker   D. perfect

15. A. conditions   B. effects   C. results   D. causes

16. A. busy   B. crowded   C. large   D. broad

17. A. using   B. wasting   C. giving   D. drawing

18. A. help   B. hope   C. thought   D. feeling

19. A. feel   B. support   C. survive   D. provide

20. A. until   B. when

  C. since   D. whereas 

Answer 1

1. A根据句意，如果这里的环境没有受到干扰，这里就可以保持(keep) 生态平衡。

2. B bring in表示"引进，引人"。

3. D in other words表示"换句话说，换而言之"。

4. D 这时生态平衡就会遭到破坏(damage) 。

5. A 人类是环境的一个组成部分。

6. D 用his指代单数名词man,

7. A 人类对环境的影响比其他任何一种生物要大得多。

8. A

9. C 人类活动导致空气、水和土壤受到污染。

10. B natural resources表示"自然资源"。

11. A 既然人类对环境进行了那么多的破坏，现在该是人类纠正(correct) 他们的行为方式的时候了。

12. A 假如现在还不是太迟的话，人类就应该纠正错误。

13. C 补救的方法掌握在年轻人手里，因为补救过程需要很长时间。

14. A the sooner...the better是比较状语从句，表示"越早……就越好"。

15. D 导致问题发生的原因用cause

16. B 世界过于拥挤(crowded) 是环境恶化的根本原因。

17. A use up表示"用完，用尽"。

18. B with no hope of replacing them表示"现在还没有希望用其他东西来替代它们"。

19. D provide ...for...表示"为……提供/供给……"。

20. C since"因为"，后面接表示形势恶化的原因。