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    Most scientists seem to agree that ____certain limit should be set on ______consumption of cars to ease air pollution.

    A．a；theB．/；theC．the；/D．the；the

    A

    解析试题分析：考查冠词：句意：大多数科学家似乎同意要对汽车的消费设置一定的限制来缓解空气污染。第一空填a，因为limit是可数名词，a certain limit一定的限制，第二空填the，是特指“汽车的消费”，所以选A。
    考点：考查冠词

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