I wondered what difficulty he had ______...

I wondered what difficulty he had _________ the plan?

A．to carry out

B．carrying out

C．carried out

D．with carrying out

B 【解析】本题考查非谓语动词。此处he had是定语从句，引导词代替difficulty做had的宾语，省略了。补充完整是he had that（difficulty）（in）carrying out…。

考点分析：

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