Question

—How about your travel?
—You can hardly imagine what difficulty we have had ______ the vast desert.

A．explored

B．exploring

C．to explore

D．explore

Answer 1

B

考查短语：have difficulty（in ）doing sth 做什么事情有困难.句意：你的旅行怎么样呀？你几乎不能想象出我们在探索大草原时有多么的困难。