Whitney Houston’s sudden death suggests that drug abuse is such a serious problem ______ we should deal with properly.
#92950
A
as
B
that
C
which
D
where
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. ________ that I was puzzled.
#94083
A
So difficult a question did he ask me
B
Such difficult a question did he ask me
C
Such a difficult question he asked me
D
He asked me a so difficult question
Not having worked out the program, ________ leave the office. 
#93247
A
so he was forbidden to
B
and he didn’t want to
C
his little son couldn’t make him
D
be couldn’t free himself to
It won’t be long _____ the island ________ to our motherland.
#94692
A
when, returns
B
before, will return
C
since, returns
D
before, returns