——Excuse me, Professor Smith, I was wondering if I could leave a quarter earlier today.
—— .
A. Nothing the matter.
B. Sure, go ahead
C. Oh, why not?
D. No trouble at all
网友回答
A. Nothing the matter.
(答案→)B. Sure, go ahead
C. Oh, why not?
D. No trouble at all
解析：可联系答.案.网客服索取。