--- Whose backpack is this?--- It be Mary’s. She is looking for hers.A. canB. mustC. mayD. can’t 题目和参考答案——青夏教育精英家教网—

题目内容

--- Whose backpack is this?

--- It be Mary’s. She is looking for hers.

A. canB. mustC. mayD. can’t

【解析】

试题分析：can可能，能够；must必须，一定；may可能；can’t不能，不可能。句意：这是谁的背包？根据下文，她正在找她的背包。可知前文指的是，它一定是玛丽的。故选B。

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