---Mr Wang, I have trouble ________ the text.

   ---I’m sure you can, but remember ________ it at least three times.

A. to understand; reading                 

B. understanding; reading          

C. to understand; to read                  

D. understanding; to read

 

【答案】

D

【解析】have trouble doing sth表示做某事有难度或困难；remember to do sth表示记着去做某事。

 

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