完形填空。阅读短文，从A、B、C三个选项中选出一个最佳选项。（共10小题，计10分）
When people talk about air pollution, they are usually thinking about outdoor air       . But do you know that there is also 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 the illnesses have        to do with the polluted indoor air.
A lot of pollution comes from indoor activities        smoking and cooking. As most people        about 80%-90% of their time inside buildings, it is important to take indoor air pollution seriously, too.
Air pollution influences our health         . When the air is polluted, not only young children and old people         from it,         people with health problems suffer as well. Indoor air pollution can        people’s eyes, noses and throats. Air pollution, both indoor and outdoor, can also        to lung cancer and heart disease! In the great London fog in 1952, 4, 000 people died in a few days         the pollution! It is said that half a million young children and women die each year in India because of indoor air pollution!
A.pollution      B.pollute       C.polluted
A.anything      B. everything      C. something
A.as well as      B. such as    C. instead of
A. take       B. cost        C. spend
A. in many ways  B. in many things    C. in many houses
A.suffer       B. bear        C. stand
A.and       B. but        C. or
A.hit        B. hurt        C. pollute
A.cause          B. get        C. lead
A.because of    B. thanks to       C. Because