-Listen! Is Mary playing the piano in the room?--No. It ________ be Mary. She has gone to Hong Kong.

题目简介

-Listen! Is Mary playing the piano in the room?
--No. It ________ be Mary. She has gone to Hong Kong.

A．may not

B．needn’t

C．can’t

D．mustn’t

题型：单选题难度：中档来源：不详

词义辨析。may not可能不；needn’t 不必；can’t不可能；mustn’t不可以。句意：听！玛丽在房间里弹钢琴吗？不。不可能是玛丽。她去香港了。所以选C。