---Would you mind if I smoked here?
--- ,but smoking is not allowed in the office.
A. You can
B. I am sorry
C. Not at all
D. Of course not
网友回答
A. You can
(答案→)B. I am sorry
C. Not at all
D. Of course not
解析：考查交际用语。A你可以的；B对不起；C一点也不；D当然不；句意：—我在这里抽烟你介意吗？—对不起，可是办公室里禁止抽烟。I am sorry, but….是一个固定句型，表示委婉的否定。故B正确。