题目内容

——Who’s the man over there?Is it Mr. Black?
——It______be him. He’s much taller.
A．may notB．can’tC．will notD．mustn’t
B
may not可能不；can’t不可能；will not不会；mustn’t禁止，一定不。句意：那边的男人是谁？是布莱克先生吗？——不可能是他。他高多了。在表示推断时，can’t表示客观的不能,故选B.
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