It is not until we know more about the situation ______ we are able to improve it.
#85181
A
that
B
what
C
when
D
which
推荐题目
The owner still doesn’t know _______ broke into the house and stole the money.
#84679
A
when it was that
B
who it was that
C
who was it that
D
when was it that
It’s necessary for us     every subject well. 
#47007
A
learn
B
learns
C
learning
D
to learn