Question

—Do you mind if I smoke?
—____

1. A.
   Why not?
2. B.
   Yes, help yourself
3. C.
   Go ahead
4. D.
   Yes, but you’d better not

Answer 1

C
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。