Question

Pollution is a serious problem. Scientists have _______ some good ways to save it.

A. come up with B. come on C. come out D. come up

 

Answer 1

A

【解析】

试题分析：句意：污染是个严重的问题，科学家们已经想出了解决的办法。A想出（注意，办法）B继续C出来，出版。D走上前，故选A。

考点：考查词组辨析。