—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.
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A
before；since
B
since；when
C
since；before
D
when；before
推荐题目
_____earth scientists understand how and why earthquakes happen, forecasts are usually inaccurate.
#32029
A
As
B
While
C
Because
D
If
The fact has worried many scientists ________the earth is becoming warmer and warmer these years.
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A
what
B
which
C
that
D
whose
The government has taken some measures to solve the problem of unemployment, but it may be some time ______ the situation becomes better.
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A
before
B
since
C
after
D
unless
After a long journey, those young men finally reached ______ they called the paradise.
#30889
A
where
B
what
C
in which
D
that