—It’s reported that the government hasn’t found the missing plane’s black box yet.—__________.
#20945
A
I don’t think so
B
I’m sorry to hear that
C
I’m afraid not
D
I hope so
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---Good morning, Grand Hotel. ---Hello, I'd like to book a room for the nights of the 18th and 19th.---_____.  
#4170
A
What can I do for you?
B
Just a minute, please.
C
What's the matter?
D
At your service.
— Why not turn to your history teacher for help? — ________.
#2091
A
I’m too busy
B
I’m sorry
C
That’s a good idea
D
It doesn’t matter