It's years         we met each other at a party in Qingdao .
#92162
A
when
B
that
C
before
D
since
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He knows         little English that he has never been offered an       job.
#93470
A
such;exciting
B
so,exciting
C
so;excited
D
such;excited
Air is to us _____ water is to fish.
#92589
A
what
B
that
C
which
D
is that
This problem is said _____ three times. 
#92660
A
having discussed
B
to have been discussed
C
having been discussed
D
to have discussed
________ he returns to his native land.
#93046
A
It is long that
B
It is not before long that
C
It won’t be long before
D
It will be long until