--- Whose backpack is this?

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

A. canB. mustC. mayD. can’t

 

B

【解析】

試題分析：can可能，能夠；must必須，一定；may可能；can’t不能，不可能。句意：這是誰(shuí)的背包？根據(jù)下文，她正在找她的背包。可知前文指的是，它一定是瑪麗的。故選B。

考點(diǎn)：考查情態(tài)動(dòng)詞

 

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