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  3. Did you know that cars and light trucks in the United States emit more carbon dioxide than any other country except China, Russi

Did you know that cars and light trucks in the United States emit more carbon dioxide than any other country except China, Russi

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问题     Did you know that cars and light trucks in the United States emit more carbon dioxide than any other country except China, Russia, and Japan? Furthermore, motor 【S1】______ are a significant source of air pollutants that cause smog and unhealthy air conditions in our cities and counties. It’s no wonder that highly 【S2】______ hybrid (混合物) electric vehicles (HEVs) are being chosen by governments and 【S3】______ around the country to improve air quality, reduce 【S4】______ on imported oil, and set an example of environmental stewardship (管家的职责) in their communities.
    They’re good for the environment, but are they going to be more troublesome than 【S5】______ vehicles? The answer is, no! Though they do rely on a battery for some of their power, HEVs don’t need to be plugged in and don’t 【S6】______ special fuel. Also, since the combustion (燃烧) engine receives less wear, these vehicles last longer and may require less 【S7】______ . While the initial price of HEVs is somewhat higher than conventional cars, that premium (额外费用) is 【S8】______ offset by lower fuel costs and higher resale values--making hybrids a good value over the lifetime of a vehicle.
    "Hybrid vehicles save consumers money, 【S9】______ as fuel prices continue to be rising, and 【S10】______ America’s energy security by making our nation less dependent on foreign oil," said Kathleen McGinty from Pennsylvania Department of Environmental Protection.

A) conventional       B) vehicles           C) generally            D) efficient
E) dependence         F) especially         G) enhance              H) businesses
I) confidential       J) require            K) retire               L) sufficient
M) depression         N) maintenance        O) specially
【S2】
选项
答案D
解析
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大学英语四级

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