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Scientists from different countries are trying to_____ a good way to solve the energy problem.

A．keep up withB．come up with
C．catch up withD．meet up with

B

解析試題分析：句意：來自不同國家的科學家們正在盡力想出解決能源問題的好的方法。A. keep up with保持不落后； B. come up with想出； C. catch up with趕上； D. meet up with偶遇，根據句意此題應選B。
考點：考查動詞詞組

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