—Who is the man over there? Is it Mr Li?...

—Who is the man over there? Is it Mr Li?

—No, it ______ be him. Mr Li has gone to America.

A．mustn't B．may not

C．can't D．needn't

C 【解析】试题分析：mustn’t：禁止、不许，不用在否定猜测中; may not：可能不是，用在不确定猜测中；needn’t没有必要；can't：不可能。（表示否定的推测）根据 Mr Li has gone to America.可知那个人不可能是李先生。故选C 考点：情态动词

考点分析：

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