—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
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_______ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
#30087
A
If
B
While
C
Because
D
As
________ you are busy, let us help you finish the project.
#32524
A
Although
B
Now that
C
As soon as
D
Even if
How can they learn much ________ they spend so much time playing computer games?
#31302
A
although
B
when
C
till
D
until
._______he is working much harder, he won’t have any trouble passing the entrance exams.
#34817
A
Ever since
B
In case
C
Even though
D
Now that
Scientists say it may be five years ______ it is possible to test this medicine on human patients．
#31988
A
since
B
until
C
before
D
when