We have to try harder and ____________ a...

We have to try harder and ____________ a better idea to solve the problem.

A. come onB. come up with

C. come trueD. come out

B 【解析】试题分析：come on快点，开始；come up with提出，想出；come true实现，成为现实；come out出版，结果是。句意：我们必须在努力一点，想出一个办法来解决这个问题。故选B。考点：考查短语辨析

考点分析：

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