问题
选择题
—How about your travel?
—You can hardly imagine what difficulty we have had ___________ the vast desert.
A．exploring
B．explored
C．to explore
D．explore
答案
答案：A
题目分析：考查词组：句意：--你的旅行怎样？--你很难想象我们探索广阔的沙漠是多么的不易。
实际上we have had ___________ the vast desert.是修饰the difficulty的定语从句，词组 Have difficulty (in) doing sth，在...方面有困难，in可以省略，故选A.