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.
【C2】

选项 A、contact
B、show
C、exposure
D、breath

答案C

解析 此处要求根据句意填入后接介词to的名词。A项contact(接触,联系)后接介词with,故不正确。B项show意为: "显示,展览,炫耀",与句意不合。D项breath(呼吸)后要求接of。所以正确答案为C,exposure to表示"暴露于"。
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