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
Some diseases are ______ by certain water animals.
A．transplanted
B．transformed
C．transported
D．transmitted
单项选择题
I-Us honeymoon expense is rather high-in ______ to his income.
A．comparison
B．proportion
C．association
D．calculation
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