The computer system _____suddenly while he was surfing the Internet. 
#69744
A
broke up
B
broke out
C
broke in
D
broke down
推荐题目
The suitcase     twenty pounds and    two meters long one meter wide.
#72883
A
is weighed ; measures
B
weighs ; measures
C
weighed ; measures
D
weighed ; was measured
To get to the top of the mountain, we had to _______.
#81498
A
go some walking  
B
do a lot of climbing
C
walking a long way
D
doing a lot of climbing