—How much do I owe you for lunch?—           .It ' s  nothing.
#1535
A
You're welcome
B
Not at all
C
Forget it
D
That's right
推荐题目
— He’s fifteen years younger than you!—_________ ?
#3010
A
What may
B
So what
C
What if
D
What about it
—Would you mind my smoking here?—_________. No smoking here. 
#22950
A
Oh, please don’t
B
Yes, please.
C
Of course not
D
It doesn’t matter
--- We’re going to play on Huaguo Mount this week. --- Really? ______!
#21542
A
Enjoy yourselves
B
Congratulations
C
It’s nice of you
D
Come on