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Scientists from different countries are trying to_______ a good way to solve the energy problem.
A．keep up with B．come up withC．catch up withD．meet up with
B

試題分析：句意：來自于不同國家的科學家正在努力相處解決能源問題的好方法。A與……保持齊頭并進B想出C抓住D碰見。根據句意選B。
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