◎ 题干
We believe scientists will _____ a way to solve the problem of airpollution.
[     ]
A. set off
B. put off
C. come up with
D. catch up with
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“We believe scientists will _____ a way to solve the problem of airpollution. [ ]A. set off B. put offC. come up with D. catch up with …”主要考查了你对  【动词短语】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。