Thescientistsarebeatingtheirbrains

发布时间：2020-07-26 19:43:31

The scientists are beating their brains trying to ________ with a solution to the problem．A.end upB.e upC.catch upD.put up

网友回答

B解析考查动词短语。本句话的意思为科学家们正绞尽脑汁地想找到一个解决问题的办法。end up with用……结束；e up with提出，拿出；catch up with赶上；put up with忍受。
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