—It’s a long time________I saw you last.—Yes，and what a pity it is now that it will be a long time________we see each other again.
#31909
A
before；since
B
since；when
C
since；before
D
when；before
推荐题目
We can find out ________ all the excitement is about by playing QQ's “Happy Farm”．
#30319
A
that
B
how
C
what
D
when
As a matter of fact, ________ matters most in learning English is enough practice.
#30329
A
where
B
why
C
which
D
what
No one knows exactly ______ this important discovery was made.
#33284
A
that
B
that how
C
what
D
when
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
In America．a friend's inviting you to a restaurant doesn't mean that he or she will pay for the meal you are told in advance．
#32275
A
unless
B
if
C
although
D
until