问题补充：
---Do you mind my smoking here?
--- . Look at the sign! It says, No smoking!
A. Never mind.
B. Of course.
C. You’d better not.
D. No, I don’t.
答案：
A. Never mind.
B. Of course.
(答案→)C. You’d better not.
D. No, I don’t.
解析： 上句句意：你介意我在这吸烟吗？根据答语中It says, No smoking!牌子上写着禁止吸烟，可知对方介意，所以选C你最好不要在这吸烟。
