问题
选择题
---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
答案：D
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。