------Is Professor Smith giving the speech today?------It ______ be him. He is a

题干

------Is Professor Smith giving the speech today?
------It ______ be him. He is abroad right now.

A．needn’t	B．can’t
C．wouldn’t	D．mustn’t

上一题下一题 0.85难度单项选择更新时间:2018-03-21 06:08:09

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