问题 选择题
—I really don’t know how to thank you enough .
      .
A.No problem B.Think nothing of it
C.Not at allD.It doesn’t matter
答案

B

think nothing of it:used as a polite response to apologies, thanks, etc,用作回应道歉.感谢等的客气话。故选B。

单项选择题
单项选择题