When people talk about air pollution, they are usually thinking about outdoor air
1 . But do you know that there is
2 air pollution inside homes, offices, hotels and other buildings? The air in your home can be 2 to 100 times more polluted than the air outdoors! In fact, some American doctors say that 50% of illnesses have
3 to do with polluted indoor air.
A lot of pollution comes from indoor activities
4 smoking and cooking. As most people
5 about 80-90% of their time inside buildings, it is important to take indoor air pollution seriously, too.
Air pollution influences our health
6 . When the air is polluted, not only young children and old people suffer from it,
7 people with health problems suffer as well. Indoor air pollution can
8 people's eyes, noses and throats. Air pollution, both indoor and outdoor, can also lead to lung cancer（肺癌）and heart disease! In the great London fog in 1952, 4,000 people died in a few days
9 the pollution!
10 is said that half a million young children and women die each year in India because of indoor air pollution!
| 小题1: | | A．pollution | B．sadness | C．illness | D．business |
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| 小题2: | | A．too | B．none | C．also | D．neither |
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| 小题3: | | A．nothing | B．everything | C．something | D．anything |
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| 小题4: | | A．as well as | B．such as | C．instead of | D．for example |
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| 小题5: | | A．take | B．cost | C．give | D．spend |
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| 小题6: | | A．in many ways | B．in many things | C．in many houses | D．by the way |
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| 小题8: | | A．hit | B．hurt | C．polluted | D．destroyed |
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| 小题9: | | A．because of | B．thanks to | C．related to | D．or |
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