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If you can’t _____ a better plan, we have to carry out the present one.

A. come along with B. come up with

C. come across D. come about for

B

【解析】試題分析：考固定詞組辨析。A和。。。一起來；B提出，想出，趕上；D因。。。而發(fā)生，出現。句意：如果你不能想出更好的方案，我們就不得不實施現在這個方案。故選B

考點：考查固定詞組辨析。

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