．You’d better get the problem solved as soon as possible ______ it becomes out of control．
#33130
A
when
B
before
C
since
D
unless
推荐题目
_______ you have seen both fighters, ______will win?．
#31845
A
Since; do you think who
B
As; who you think
C
When; whoever
D
Since; who do you think
________one scientist has pointed out, children’s skulls are not fully developed.
#34231
A
That
B
As
C
Which
D
What
Allow children the space to voice their opinions, ____ they are different from your own.
#31756
A
until
B
even if
C
unless
D
as though
It was not long _____ he was born that his mother died of illness.
#32652
A
before
B
when
C
that
D
after