Question

For years scientists have been worrying 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. It may be one hundred times worse.

Indoor air pollution can cause a person to feel tired, to suffer eye pain, headache and other problems. Some pollutants can cause breathing disorders, diseases of blood and even cancer, Most scientists agree that every modern house has some kind of indoor pollution.

People have paid more attention to the problem now. It is true that when builders began making houses and offices they did not waste energy. To do this they built buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials 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 do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and through its tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square metres of space. 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. Having green plants inside your house can make it a prettier and more healthy place.

1.Generally speaking, indoor air pollution may be more harmful than the air outside because ________.

A．indoor air pollution can make a person seriously ill

B．man - made building materials give off dangerous gases

C．there may be more harmful gases outside the buildings

D．the air indoors is polluted, which is very harmful

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

A. every modern house

B. every old house

C. all kinds of houses

D all kinds of offices

3. The indoor air pollution is caused by ______

A. the limit of the flow of air between inside and outside

B. the building way that the builders want to save energy

C. the building things that are made of man-made materials

D. the man-made building materials and the limit of airflow

4.The reason why we should use different kinds of plants to clean the air is that _______

A. plants can let out all kinds of pollutants indoors

B. plants may take in more oxygen which people need

C. plants can absorb all kinds of harmful indoor chemicals

D. plants can make our houses prettier and more healthy

 

Answer 1

1.B

2.A

3.D

4.C

【解析】

試題分析：

1.細節(jié)理解題。第二段中下面兩句可以說明問題“To do this, they built buildings that limited the flow of air between inside and outside.”“These materials are now known to let out harmful gases.”人造的建筑材料會釋放出有害的氣體，注意let out的含義與B選項中g(shù)ive off的含義相同。故選B。

2.細節(jié)理解題。由第二段最后一句“Most scientists agree that every modern house has some kind of indoor pollution. ”可知，室內(nèi)污染存在于每個現(xiàn)代房屋中。故選A。

3.細節(jié)理解題。由第三段“To do this they built buildings that limited the flow of air between inside and outside. They also began using man-made building materials.”可知，室內(nèi)人造建筑材料和封閉的室內(nèi)空氣流動環(huán)境造成了室內(nèi)污染。故選D。

4.細節(jié)理解題。本文最后兩句“So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and more healthy place.”是說不同種類的植物讓室內(nèi)空氣變得更加清新健康，換句話說就是能夠吸收所有種類有害的室內(nèi)化學氣體。故選C。

考點：科教類閱讀