—May I ask you one more question Mr. Smith? —Sure !A. go aheadB. calm downC. take careD.

问题补充：

—May I ask you one more question, Mr. Smith?

—Sure, !

A. go ahead

B. calm down

C. take care

D. help yourself

答案：

(答案→)A. go ahead

B. calm down

C. take care

D. help yourself

解析：固定答语。