—I think the man over there must be Bob....

—I think the man over there must be Bob.

-- It_______ be him. He has______ to Australia.

A. can’t, gone B. can’t, been C. may not, been D. mustn’t, gone

A 【解析】试题can’t不可能；may not可能不，表示不太确定的推测；mustn’t禁止，一定不。句意：我认为那边的男人一定是汤姆。——不可能是他。他已经去了美国。结合语境可知下文描述的是现在已经完成的动作，be强调的是动作的持续状态，结合语境可知选A。

考点分析：

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