—How about your travel? —You can hardly imagine what difficulty we have had ___________ the vast desert.
#12675
A
exploring
B
explored
C
to explore
D
explore
推荐题目
The discovery of the new drug is of great ____ to people who suffer from heart problems.
#12293
A
appreciation
B
significance
C
satisfaction
D
guidance
 ______ the dog, I ______  in love with animals gradually.
#12668
A
While walking , fell
B
While walked, fell
C
While is walking, am
D
When was walked, was