—__________ do you swim?   —Twice a week. 
#24489
A
How long
B
How many times
C
What time
D
How often
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— 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