Do you know the diffculty he had ____the work.A.on finishing B.to_英语解答

Do you know the diffculty he had ____the work.
A.on finishing B.to finish
c.finishing D.have finished

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解答

C.句子中的he had 做定语修饰diffculty（定语从句）把he had 去掉,再看看这个句子：Do you know the diffculty ____the work.在这,考察diffculty的一个用法：diffculty （in) doing sth.其中的in可以省略.所以选择C...