we were playing basketball on the playground, it began to rain.
#52031
A
While
B
After
C
Before
D
Since
推荐题目
She looks forward to _______ the Great Wall
#61866
A
visit
B
visits
C
visited
D
visiting
My father is able to _______many different kinds of computers. 
#52839
A
look up
B
take up
C
fix up
D
clean up
 Can you           good solutions to these problems?
#57274
A
think over
B
come up with
C
think about
D
catch up with
Hurry up!The play        for ten minutes.
#55177
A
has begun
B
began
C
has been on
D
has been