May I smoke here?

问题描述:

May I smoke here?
A.may not B.mustn't C.needn't D.can't
please tell me why.thank you

1 B You mustn't.
用May 开头的疑问句,肯定回答为:
Yes ,you can./Go ahead...
否定回答为:
No you mustn't/I am afraid not.