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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