The Great Wall was built to keep the invaders. A. inB. outC. upD. off

发布时间：2020-08-14 23:26:42

The Great Wall was built to keep       the invaders.
A. in
B. out
C. up
D. off

网友回答

A. in
(答案→)B. out
C. up
D. off
解析：固定搭配keep—out意思“防御----”
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