题目内容

They built a wall to______wolves______their ranch.

A. protect, from
B. keep, out of
C. limit, to
D. preserve, from

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As there was a power cut in the hospital, the surgeon had to call______the operation.

A. on
B. off
C. out
D. for

While Stella was in Paris, she______a lot of French.

A. got around
B. took in
C. put away
D. picked up

Although they are poor, they have______up five children very well.

A. grown
B. taken
C. brought
D. pulled

The above discussion has______the rise of US imperialism at the expense of its competitors.

A. centered on
B. centered at
C. centered towards
D. centered for

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