________ some teenagers don't realize is ________ difficult life can be after they get addicted to drugs.
#30309
A
What; what a
B
That; how
C
What; how
D
That; what
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Julie was good at German，French and Russian，all of ________ she spoke fluently.(2011·湖南)
#30493
A
who
B
whom
C
which
D
that
The so-called Asia—Pacific century will make no sense_____ China develops．
#30731
A
unless
B
when
C
if
D
as
Doctor Brown says that _______ what forceful arguments against cigarette harm there are, many people insist on smoking.
#80091
A
though
B
however
C
no matter
D
even if