To get to the top of the mountain, we had to _______.
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A
go some walking  
B
do a lot of climbing
C
walking a long way
D
doing a lot of climbing
推荐题目
His success _______ his hard work.
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A
results in
B
results from
C
lies on
D
roots in
Huge trees on the green land were cut down, ____ the city being buried by sand.
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A
led to
B
caused
C
resulting in
D
being caused