-- Could you say it again, please?-- ______________.
A.Certainly
B.That's nothing
C.Yes, you are welcome
D.Yes, I am glad about it
正确答案是A
-- Could you say it again, please?-- ______________.
A.Certainly
B.That's nothing
C.Yes, you are welcome
D.Yes, I am glad about it
正确答案是A