We believe scientists will ______ a way to solve the problem of air pollution.

A. come up with B. catch up with

C. come out D. come up

 

A

【解析】

試題分析：句意：我們相信科學(xué)家會想出解決空氣污染問題的方法。A. come up with想出； B. catch up with趕上； C. come out 出版； D. come up發(fā)生，根據(jù)句意是想出方法，所以選A。

考點：考查動詞詞組

 

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