—Do you know Anna's telephone number?—________.As a matter of fact,I don't know any about Anna,either.
#1597
A
I think so
B
I'm afraid not
C
I hope so
D
I'd rather no
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—It’ll take me at least 2 hours to do this!  —Oh, _______! I could do it in 30 minutes. 
#2089
A
come on
B
pardon me
C
you are right
D
don’t mention it
---What can I do for you?       ---__________________.
#21094
A
It’s very nice of you
B
I can do it by myself
C
Yes, I’d love to
D
I’m looking for a present
—Excuse me, could you tell me where the post office is? —__________, but I’m a stranger here.
#3899
A
I’m not sure
B
I’m sorry
C
That’s righ
D
I’m afraid not