When people talk about air pollution,they are usually thinking about outdoor air 1         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 illnesses have 2       to do with polluted indoor air.

    A lot of pollution comes from indoor activities 3       smoking and cooking. As most people 4       about 80% - 90% of their time inside buildings,it is important to take indoor air pollution seriously,too.

   Air pollution influences our health 5       When the air is polluted,not only young children and old people 6       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 9       to lung cancer and heart disease!In the great London fog in 1952,4,000 people died in a few days 10       the pollution!It is said that half a million young children and women die each year  inIndiabecause of indoor  air pollution!

(   ) 1. A. pollution     B. pollute

C. polluting     D. polluted

(   ) 2. A. nothing     B. everything

C. something     D. anything

(   ) 3. A. as well as     B. such as

C. instead of     D. so as

(   ) 4. A. take     B. cost  C. spend     D. give

(   ) 5. A. in many ways     B. in many things

C. in many houses D. in many years 

(   ) 6. A. worry     B. bear

C. stand     D. suffer

(   ) 7. A. and     B. but  C. or     D. while

(   ) 8. A. hit     B. hurt

C. pollute     D. beat

(   ) 9. A. cause     B. get

C. give     D. lead

(   ) 10. A. because of     B. thanks to

C. related to     D. because

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