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Diamond, _________, is the hardest of all materials.
#78514
A
like we know
B
since we know
C
we know
D
as we know
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This is the place ________________the foreign guests are going to visit.
#77399
A
不填
B
where
C
what
D
when
 Saving money is ________ we must do.
#78191
A
what that
B
anything that
C
something that
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Everyone likes to live in a house ______ windows face the south.
#77289
A
whose
B
which
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We have reached a stage       we will never give in.
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what
B
which
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He is confident,       ,in my opinion, is most important in society.
#78364
A
how
B
that
C
what
D
which