—I want to know if I smoke here. —No you . Could you see the sign “ No Smoking” there?A.

问题补充：

—I want to know if I smoke here.

—No, you . Could you see the sign “ No Smoking” there?

A. can; needn’t

B. must; can’t

C. shall; won’t

D. can; mustn’t

答案：

A. can; needn’t

B. must; can’t

C. shall; won’t

(答案→)D. can; mustn’t

解析：根据句子的意思好额情景反应，可知答案为D，即问句为不知是否可以，而答语表示禁止做某事。