问题补充：
--- Could I ask you some personal questions?
--- .
A. Yes, don’t worry.
B. Sure, go ahead.
C. Yes, help yourself.
D. Sure, why not?
答案：
A. Yes, don’t worry.
(答案→)B. Sure, go ahead.
C. Yes, help yourself.
D. Sure, why not?
解析：本题考查交际用语。go ahead好吧，用来表示赞同别人的做法，根据句意选B。
