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问题: You _____go and ask him,but he ____answer you.

You _____go and ask him,but he ____answer you.
A.may...may not B.can ...can C.must...may D.can’t ...must

解答:

A.may...may not
都是表示推测的含义
根据上下文理解一下,must不通,can的语气过于强烈.