一Why didn’t you try your best to get on the bus?一I tried to,but ______ I could,it started moving.
#32478
A
until
B
when
C
before
D
after
推荐题目
_______ you start, you should go ahead.
#31315
A
Once
B
Before
C
Until
D
Though
__________ he took part in the competition, he won a second prize. 
#33676
A
The first time
B
For the first time
C
At a time
D
At one time