Question

    For years scientists have been worried about the effects of air pollution on the earth's natural conditions. Some believe the 16 inside many houses may be more dangerous than the air outside. It may be one hundred times 17 Indoor air pollution can 18 a person to feel tired,to suffer eye-pain,headache and other 19 Some pollutants can cause breathing disorders,diseases of blood and 20 cancer. Most scientists agree that every modem house has some kind of 21 pollution.

    People pay more 22 to the problem now. It is true that when builders began making 23 and offices they did not want to waste energy. To do this they built buildings that limited the flow of air between inside and outside. They also began 24 man-made building materials. These 25 are now known to let out harmful gases. 26 the problem became more serious,scientists began searching for a 27 to deal with it. They discovered a natural pollution control system 28 building—green plants. Scientists don't really know how 29 control air pollution. They believe that a plant's leaves absorb or 30 the pollution. In 31 the plant lets out oxygen through its leaves and tiny organisations on its roots. Scientists 32 that all buildings should have one large plant or several small plants inside for every nine square metres of space. 33 of different plants show that each absorbs different chemicals. So the most effective way to 34 the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and 35 place.

16. A. air   B. light

   C. health   D. atmosphere

17. A. lighter   B. worse   C. thicker   D. heavier

18. A. permit   B. desire

   C. cause   D. persuade

19. A. pollution   B. gases

   C. difficulties   D. problems

20. A. at least   B. hardly

   C. only   D. even

21. A. actual   B. loose

   C. indoor   D. downtown

22. A. fear   B. attention

   C. remark   D. store

23. A. houses   B. preparations

   C. furniture   D. efforts

24. A. using   B. resisting

   C. valuing   D. judging

25. A. materials   B. tables

   C. industries   D. drinks

26. A. If   B. Although

   C. As   D. Unless

27. A. chance   B. instruction

   C. scientist   D. way

28. A. from   B. for

   C. with   D. like

29. A. water   B. plants

   C. products   D. measures

30. A. take in   B. put off

   C. let out   D. give out

31. A. time   B. exchange

   C. order   D. particular

32. A. suggest   B. require

   C. beg   D. order

33. A. Colours   B. Studies

   C. Roots   D. Containers

34. A. share   B. reduce

   C. clean   D. increase

35. A. bigger   B. brighter

   C. better   D. healthier

Answer 1

16. A 17. B 18. C 19. D 20. D 21. C 22. B 23. A 24. A 25. A 26. C 27. D 28. B 29. B 30. A 31. B 32. A 33. B 34. C 35. D

16. A 解析：由下文的the air outside可知 答案。

17. B解析:上句话说室内空气比室外空气 差，本句说的是室内空气比室外空气差的 倍数。

18. C解析:句意:室内空气污染会使人感到 疲惫、眼睛疼痛、头痛以及产生其他问题。

19. D解析:疲劳、眼睛疼痛、头痛都是室内 污染所带来的问题，所以本空选择prob-lems

20. D解析:“导致癌症”与“导致呼吸紊乱、 血液病”在程度上有递进的关系，故 用even

21. C解析:第二段讲的是室内污染带来的 一些问题，以及所导致的一些疾病，因此此 处指多数科学家认为每一个现代居室都存 在着某种室内污染。

22. B解析:本句话表示“现在人们开始更多 地关注这个问题”。

pay attention to“注意， 重视”，是固定搭配。

23. A 解析：由下一句“To do this they built buildings that limited the flow of air between inside and outside. ”可知，所填词与建筑有 关，所以选houses。

24. A解析:上文提到，他们在建造房屋与办 公室时不想浪费能源，所以此处指他们也 开始使用人造的建筑材料，所以填using。

25. A 解析：由上句的 man-made building materials 可知 ，这里表示这些“ 材料” 释放有 害气体。

26. C 解析：下半句 scientists began searching for a 27 to deal with it是上半句的结果。上半句句意：因为这个问题越来越 严重。

27. D解析:解决污染问题，只能是寻找一种 方法，故用way。

28. B解析:本句句意:他们发现了一种适用 于建筑的天然的污染控制系统——绿色植 物。

for在此表示“适用于”。

29. B 解析：由下一句 “ They believe that a plant's leaves absorb or 30 the pollu-tion. ”可知，此处选plants。

30. A解析：由空前的or可知，该空应与absorb 是 同义词，故用 take in 

31. B解析：句意：在交换中，植物通过叶子 和根部的小组织来释放出氧气。所以应为 exchange “交换”。“交换”指的是植物吸收 污染物，然后释放氧气。

32. A解析：由语境可知此处选suggest。

33. B解析:句意:不同植物的研究表明每种 吸收不同的化学物质。选B.

34. C解析:绿色植物对控制室内污染有很 好的作用，故推断此空填clean。clean the air意为“净化空气”。

35. D解析：由于绿色植物能够净化室内空 气，所以在房间里放置绿色植物能够使房 子漂亮并有益于健康。