1. The policeman c the prisoners not to play any tricks.
科目：高中英語 來源： 題型：
Ecology (生態學) 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 (毀滅) 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 (補救法) 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
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科目：高中英語 來源： 題型：
7. ―What do you think of the movie?
—Oh,excellent!It's worth (see) a second time.
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科目：高中英語 來源： 題型：
4. Founded in 1936,Harvard is one of (famous) universities in the United States.
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