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- Who be phoning us at this time of night? - It might be your sister. A.might B.

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- Who be phoning us at this time of night? - It might be your sister. A.might B.

— Who _____ be phoning us at this time of night?

— It might be your sister. 

A.might B.can C.dare D.must

试题答案

B

解析试题