单项选择题

Many birds are injured when trying to ______wings with large gaps in the clip.

A．slapped
B．scratched
C．flapped
D．fluctuated
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单项选择题
They had to______ their way through a mist that was rapidly turning into a thick fog.
A．converge
B．grope
C．strive
D．grip
单项选择题
I'm afraid we can't accept this credit card -- it______ last week:
A．exceeded
B．expired
C．terminated
D．elapsed
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