问题补充：
—Sorry, do you mind if I smoke here?
—Yes,
A. you could
B. go ahead
C. I do
D. my pleasure
答案：
A. you could
B. go ahead
(答案→)C. I do
D. my pleasure
解析：考查交际用语。回答mind的问句有两个，表不介意时用“No.”表介意时用“Yes”,此处答语是“Yes”，意思是“是的。我介意，”排除A，B;而D项是用于感谢的回答，选C符合，do代替mind
