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 This is _______ difficult problem that few students can work it out.
#39315
A
so
B
so a
C
such
D
such a
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 I am sure that if it came to that point, he would do ________ is expected of him.
#78855
A
what
B
when
C
which
D
as
I wonder _________Eddie has gone to Singapore.
#38923
A
how long
B
how often
C
when
D
if
(2011·北京，31)The shocking news made me realize ________ terrible problems we would face.
#78800
A
what
B
how
C
that
D
why
Bob doesn’t know ________ to write about.
#37769
A
how
B
that
C
what
D
Where
– Do you know __________ the iPhone 4 yesterday?–Sorry, I have no idea about it.
#38872
A
how much did he pay for
B
how much he paid for
C
he paid for how much
D
he paid how much for