题目内容

________ air is to man, so is water to fish.

A.
Since
B.
Just
C.
Like
D.
As

D
解析：由as，just as引导的方式状语从句也可以放在句首，主旬前常加so与之呼应，以加强语气，而且用倒装语序。此句相当于：Air is to man what water is to fish。

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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. 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（污染物） can cause breathing disorders, diseases of blood and even cancer, Most scientists agree that every modern house has some kind of indoor pollution. People began to notice the problem in the early 1970s. It is 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 manmade 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.

64．Generally speaking, indoor air pollution may be more harmful than the air outside because ________.
A. the man - made building materials let out dangerous gases inside houses
B. there may be more harmful gases outside houses
C. the flow of air indoors is limited
D. indoor air pollution can make a person seriously ill
65．The indoor air pollution is caused________.
A. by the building method through which the builders want to save energy
B. by the limit of the flow of air between inside and outside
C. by the building things which are made of man - made materials
D. not only by the limit of air - flow but also by the man made materials
66．The most effective way to clean the air is to use different kinds of plants because________.
A. they may let out more oxygen which people need
B. they can absorb different kinds of the harmful indoor chemicals
C. they can take in all kinds of indoor pollutants
D. they can make your house prettier and more healthy

阅读下列句子，用所给单词或短语的正确形式填空

reflect, disable, benefit, otherwise, voluntary, upside down, in other words, meet with, fit in, make fun of

【小题1】Fresh air is _________to our health.
【小题2】Usually a child’s behavior is a __________ of his family environment.
【小题3】He told lies, _____________, he cheated us.
【小题4】People with _______________should have the same opportunities as able–bodied people.
【小题5】I hope the arrangements will ___________ your approval.
【小题6】In order to look for his key, Peter turned the whole house ______________.
【小题7】He doesn’t eat much, ____________he would put on weight now.
【小题8】Amy joined a painting group but had difficulty_____________, so she left.
【小题9】Nobody wants to _______________ especially in public.
【小题10】He would like to help those in need _________rather than be asked to do so.

Most Americans would find it hard to think that what life   【小题1】
would look like without a car. But, some have realized                         【小题2】
the serious question of the pollution caused by the car.                         【小题3】
The polluted air becomes harmful and dangerous to health             【小题4】
One way to getting rid of the polluted air is to build a             【小题5】
car that doesn’t cause pollution. That is how several of the          【小题6】
large car factories have been tried to do. But to build               【小题7】
a clean car is more easier said than done. Progress in this           【小题8】
field has been slow.
Another way is to take place of the car engine by a                      【小题9】
steam one. Inventors are now working on steam cars as well as
electric cars. Many makers believe that it will spend                 【小题10】
years to develop a practical model that pleased people

阅读下列句子，用所给单词或短语的正确形式填空

reflect, disable, benefit, otherwise, voluntary, upside down, in other words, meet with, fit in, make fun of

1.Fresh air is _________to our health.

2.Usually a child’s behavior is a __________ of his family environment.

3.He told lies, _____________, he cheated us.

4.People with _______________should have the same opportunities as able–bodied people.

5.I hope the arrangements will ___________ your approval.

6.In order to look for his key, Peter turned the whole house ______________.

7.He doesn’t eat much, ____________he would put on weight now.

8.Amy joined a painting group but had difficulty_____________, so she left.

9.Nobody wants to _______________ especially in public.

10.He would like to help those in need _________rather than be asked to do so.

For years scientists have been concerned 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(污染物)can cause breathing disorders,diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution.People began to notice the problem in the early 1970s.It is said that 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 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 healthier place.

77.What is the topic of the passage?

A.Air pollution.

B.Green plants indoors.

C.Indoor air pollution.

D.Environment protecting.

78.What makes indoor air pollution more harmful than that of the air outside?

A.The limited flow of air indoors.

B.Man-made building materials.

C.Fewer green plants inside houses.

D.The energy-saving materials indoors.

79.The most effective way to clean the air is to use different kinds of plants because______.

A.they can make houses pettier and healthier

B.they may let out oxygen which people need

C.they can take in all kinds of indoor pollutants

D.they can absorb different harmful indoor chemicals

80.Which of the following is implied but NOT stated?

A.keep windows open and let fresh air in.

B.Scientists have a clear idea how plants control air pollution.

C.Oxygen is let out through the leaves and roots of the plants.

D.Green plants are a natural pollution control system for building.

________ air is to man, so is water to fish.

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