The government has taken some measures to solve the shortage of electricity, but it may be some time ____________ the situation improves.
#31321
A
since
B
when
C
unless
D
before
推荐题目
____ regular exercise is very important, it’s never a good idea to exercise too close to bedtime.
#30024
A
It
B
As
C
Although
D
Unless
The fact that smoking is harmful to health is__________ most smokers admit．
#32340
A
what
B
whether
C
where
D
that
We were having a meeting _________ suddenly someone knocked at the door.
#32482
A
because
B
when
C
as
D
while