单项选择题

The wings of the birds still ______ after it had been shot down.

A．slapped
B．scratched
C．flapped
D．fluctuated
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单项选择题
Although some students graduate from high school, they are virtually illiterate ______ writing a business letter.
A．in the event of
B．in the light of
C．in case of
D．in terms of
单项选择题
How I wish that the engine______ down on our way back home last night.
A．didn't break
B．would not break
C．hadn't broken
D．shouldn't break
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