—When did he leave the classroom?—He left _____you turned back to write on the blackboard.
#80113
A
the minute
B
the time
C
until
D
before
推荐题目
_____ we choose healthy food for our main meals, we probably still need to exercise now and then.
#79788
A
Unless
B
As though
C
Until
D
Even if
______ the rising rent prices in Wuhan can’t compare with those in Beijing and Guangzhou, they still worry current college students．
#33453
A
Even though
B
As though
C
In case
D
As long as
The elderly patients still prefer the traditional way, ______ online booking system is supposed to be convenient and fast.
#31880
A
while
B
though
C
unless
D
as