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---Do you often stay up?---No. I always get a good night’s sleep _______ much work I have to do.                         
#68549
A
whenever
B
however
C
whatever
D
whichever
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________ your composition carefully, some spelling mistakes can be avoided.
#67555
A
Having checked
B
Checking
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If you check
D
To check
The factory was built in a secret place, around ______ high mountains.
#73353
A
which was
B
it was
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which were
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them were
 I have made great progress ________ his help. Which of the following is not correct?
#69899
A
with
B
because of
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as a result of
D
because
David is such a good boy        all the teachers like.
#69977
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that
B
who
C
as
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whom
Even if there is no scientific proof        secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk.
#67696
A
which
B
that
C
when
D
where