________ the mountains was hard work for them but as they looked around, they could not help screaming.
#96571
A
Climb
B
To climb
C
For climbing
D
They climbed
推荐题目
To learn to speak English well,_____.
#97514
A
much practice is needed
B
one needs much practice
C
much practice is needed by one
D
one is needed much practice
The students expected ____ more reviewing classes before the exam. 
#95664
A
there to be
B
there are
C
there being
D
there to have