Scientists from different countries are trying to_____ a good way to solve the energy problem. A. ke...
2023-02-04 19:22:44 67次 2013-2014学年江苏省南京市九年级下学期初测试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Scientists from different countries are trying to_____ a good way to solve the energy problem.
A. keep up with B. come up with
C. catch up with D. meet up with
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