问题补充：
-Do you mind if I smoke here?
- You can go to smoke in the next door.
A. Yes, please.
B. Never mind.
C. Youd better not.
D. Of course not,
答案：
A. Yes, please.
B. Never mind.
(答案→)C. Youd better not.
D. Of course not,
解析：句意：如果我吸烟你介意吗？你最好别吸烟，你可以在隔壁吸烟。Do you mind ？不介意：Of course not,表示介意经常用Youd better not.。故选C
