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    精英家教网 > 高中英语 > 题目详情
    It             be the vocabulary that caused you the problem in the exercise because you know a lot of words.
    A．couldn’t B．mayC．should D．needn’t
    A

    试题分析：A、不会，不可能；B、可以；可能； C、应该；D、不必。句意：不可能是词汇导致你在考试中出这个问题，因为你知道很多单词。这里的could用于否定句表示否定推测“不可能“，结合语境可知选A。
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