May i smoke here?-No,---A .You mustn't B.you may not C.you'd better not D.all the three answers说明原因

May i smoke here?-No,---
A .You mustn't B.you may not C.you'd better not D.all the three answers
说明原因

答案是D.
may i smoke here?我可以在这里吸烟吗?
no,---
A.绝对不行.
B.你不可以
C.你最好不要.
D.以上三项都对.