问题
选择题
You can never imagine what great difficulty I have _____ your house.
A．found
B．finding
C．to find
D．for finding
答案
答案：B
题中difficulty为先行词，后接定语从句(that) I have ，实际上构成一个固定句型：have difficulty (in) doing sth.。因为in 可以省略，所以选B。