You can never imagine what great trouble I have had ______ the customer to withdraw a clai

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You can never imagine what great trouble I have had ______ the customer to withdraw a claim.

A.persuade

B.to persuade

C.persuading

D.persuaded

请帮忙给出正确答案和分析,谢谢!

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答案解析

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  • 正确答案:C
    此题容易根据had误选过去分词persuaded。解题关键在于识别固定短语havetroubledoingsth.“做某事有困难”,whatgreattroubleIhave是一个感叹句结构,将其转化成正常结构,即Ihavehadgreattroubleindoing.…所以答案为C。