Question

For years scientists have been worried about the effects of air pollution on the earth's natural conditions. Some believe the air inside many houses may be more dangerous than the air outside.

Most scientists agree that every modern house has some kind of indoor pollution. People began to notice the problem in the early 1970s. When builders began making houses 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 used man－made building materials which are now known to let out harmful gases.

As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building green plants.

Scientists believe that a plant's leaves absorb the pollutants (污染物). In exchange the plant lets out oxygen through its leaves. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants.

1.Indoor air pollution may be more dangerous than the air outside mainly because .

A. the building are too high

B. the flow of air indoor is limited

C. the building materials are harmful

D. people don't want to waste energy

2.Some kind of indoor pollution can be found in .

A. all kinds of offices B. all kinds of houses

C. every modern house D. every old house

3.In the last paragraph the word“ absorb” may mean .

A. take in B. bring up C. give out D. turn into

4.Scientists believe that plants can .

A. change oxygen into pollutants

B. absorb all the pollutants

C. make your houses more prettier

D. absorb pollutions and let out oxygen

5.According to the last paragraph, we should to clean the air.

A. plant all kinds of plant

B. plant more trees.

C. have the same kind of plant

D. have different kinds of plants

 

Answer 1

1.B

2.C

3.A

4.D

5.D

【解析】

試題分析：文章大意：本文主要講述了室內(nèi)空氣污染的原因并提出了解決的方法，就是在家里種植綠色植物。

1.細(xì)節(jié)理解題。根據(jù)文章第三段最后2句They also began using man-made building materials. These materials are now known to let out harmful gases.可知B項(xiàng)是室內(nèi)空氣污染的主要原因。故選B。

2.細(xì)節(jié)理解題。根據(jù)第二段最后一句Most scientists agree that every modern house has some kind of indoor pollution.可知在每一所現(xiàn)代的房子里都有室內(nèi)空氣污染的現(xiàn)象。選C。

3.詞義猜測(cè)題。根據(jù)文章中Scientists believe that a plant's leaves absorb the pollutants (污染物).可以推測(cè)出absorb為“吸收”之意，選A。

4.文章最后一段Scientists believe that a plant's leaves absorb the pollutants (污染物). In exchange the plant lets out oxygen through its leaves.可知科學(xué)家認(rèn)為植物可以吸收污染物和釋放氧氣，選D。

5.細(xì)節(jié)理解題。根據(jù)文章最后一段Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants.可知不同的植物能夠吸收不同的化學(xué)物質(zhì)，選D。

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