问题描述：
May I smoke here,please?
I am afraid you ---This is a nonsmoking area
A.can
B.can't
C.may
D.may not
may 提问为什么用can回答
I am afraid you ---This is a nonsmoking area
A.can
B.can't
C.may
D.may not
may 提问为什么用can回答
问题解答：
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