None of us knew how the change had come______.A、acrossB、aboutC、overD、downB考查

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问题 None of us knew how the change had come______.

选项 A、across
B、about
C、over
D、down

答案 B

解析 考查动词短语。句意:我们都不知道变化是怎么发生的。come across偶遇;come about发生;come over过来;突然感到;come down下降;着陆;崩塌,综合句意选择B。
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