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The scientists are beating their brains, trying to ______ a solution to the problem.

A. look up toB. live up toC. come up with D. keep up with

 

C

【解析】

试题分析:考查动词短语辨析。Look up to尊重某人;live up to 不辜负;come up with 提出;keep up with 追赶。句意:科学家们正绞尽脑汁出解决问题的方案。根据句意所以选C项。

考点 : 考查动词短语辨析

 

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