Pollution caused by motor vehicles can kill more people a year than road accidents. The World Health Organization(WHO)has found

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问题     Pollution caused by motor vehicles can kill more people a year than road accidents. The World Health Organization(WHO)has found that after studying【C1】______ countries— Austria, France and Switzerland.
    Long-term【C2】______ to exhaust fumes caused the premature death of 21 000 people【C3】______ respiratory and heart disease in the three countries,【C4】______ with nearly 10 000 deaths from accidents, WHO【C5】______ said last week.
    The report was prepared for【C6】______ to a conference of 70 environment and health ministers being organized by the United Nations agency in London. "The growing evidence【C7】______ air pollution is causing a major health burden adds to the effects of road traffic through noise, accidents and barriers【C8】______ cycling and walking, and we need to approach this head on," said Carlos Dora, a doctor with the WHO’s European center for environment and health.
    "We are paying a huge【C9】______ for this excessive road transport; with our money and with our health. " One-third of pollution from fine particles which congest the lungs was【C10】______ by motor vehicles, rising to one-half in cities, the WHO found.
【C8】

选项 A、to
B、of
C、on
D、against

答案A

解析 本题所在的部分意思是:"对自行车和行人行走的妨碍"。空格处要求填入表示对应关系的介词。A项to意为:"对……",为正确答案。B项表示具有某种性质、内容、状况等,C项意为:"在……上,在……时候",D项意为:"反对,防备"。B、C、D三项都不合题意。
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