—I’m sorry to have kept you waiting.—____, Bill. 
#1979
A
You’re welcome
B
Go ahead
C
Don’t mention it
D
No problem
推荐题目
—Can I help you,sir?—___________.
#4062
A
Yes,you can
B
No,I don’t buy anything
C
Of course,if you like
D
No,thanks.I’m being served
— Would you mind my challenging you to a game of chess? — ______.
#2155
A
No, never mind
B
Yes, you are welcome
C
No, go ahead please
D
Yes, I’m expecting