It wasn’t long before they found that there was much trouble______the plan.

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问题 It wasn’t long before they found that there was much trouble______the plan.

选项 A、to carry out
B、carrying out
C、with carrying out
D、to have carried out

答案B

解析句意：不久，他们就发现实行该计划非常困难。there is no difficulty／trouble(in)do一ing sth．为固定用法，意为“做某事不困难”，题干中为该搭配的肯定形式，即thereis much trouble(in)doing。

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