--Who it be that is knocking at the door?--It be Father, but I’m not sure.A. can; may B. can; mustC. must; can D. may; must 题目和参考答案——青夏教育精英家教网—

题目内容

--Who______ it be that is knocking at the door?

--It ______ be Father, but I’m not sure.

A. can; may B. can; must

C. must; can D. may; must

【解析】

试题分析：考查情态动词。句意：--敲门的人会是谁呢？--可能是爸爸，但我也不确定。must表示肯定的推测，意为“一定”，根据“I’m not sure”可排除B、D；can表示推测时意为“可能”，用于否定句或疑问句，must不用于疑问句，排除C，故选A。

考点：考查情态动词

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