题目内容

It ?????????? be the vocabulary that caused you the problem in the exercise because you know a lot of words.

A. may ????????????? B. couldn’t ????????????? C. should ????????????? D. needn’t

【答案】

【解析】

试题分析：A、可以；可能；B、不会，不可能；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B。

考点：考查情态动词

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