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Some birds to the south before winter.A. run B. swim C. walk D. fly 【查看更多】

 

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Some birds ________ to the south before winter.

A. run

B. swim

C. walk

D. fly

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Some birds               to the south before winter.
[     ]
A．run
B．swim
C．walk
D．fly

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Before winter, some birds ________ to the south.

A. run

B. swim

C. walk

D. fly

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