With some technical problems to be solved, it may be a while _______ the system is put into use.
#32713
A
when
B
after
C
since
D
before
推荐题目
__________ you work harder than before, you will pass this exam.
#31982
A
As soon as
B
As long as
C
As if
D
Even if
________ all of them are strong candidates，only one will be chosen for the post.
#30231
A
Since
B
While
C
If
D
As
--- John failed his final exam.-- I’m not surprised at the news at all. _______, he is never seen busy with his lessons.
#31414
A
Above all
B
In all
C
First of all
D
After all
. It is only when we cannot see clearly _____ we come to see ______ important our eyes are.
#34306
A
that; what
B
which; what
C
that; how
D
which; how