—Do you mind if I smoke? — A. Why not?B. Yes help yourselfC. Go aheadD. Yes but you’d b

问题补充：

—Do you mind if I smoke?

—

A. Why not?

B. Yes, help yourself

C. Go ahead

D. Yes, but you’d better not

答案：

A. Why not?

B. Yes, help yourself

(答案→)C. Go ahead

D. Yes, but you’d better not

解析：本题考查交际用语，表示许可时，肯定回答常用“Yes, please./ Of course, you may./ Go ahead, please./ Not at all./ Just help yourself.”等表示。B和D选项前后矛盾。