_______ medicine works in a human body is a question _______ not everyone can understand fully.
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A
How; that
B
That; which
C
That; which
D
What; that
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Parents should see to it _______ their children form the habit of brushing their teeth every day.
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A
this
B
that
C
whether
D
if
The house ________ I grew up has been taken down and replaced by an office building.
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A
that
B
in that
C
which
D
in which
---What do you think of teaching , Bob？ ---I find it fun and challenging. It is a job ___you are doing something serious but interesting
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A
where
B
which
C
when
D
that
The time is not far away ___ modern communication will become widespread in China’s vast countryside.
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when
B
as
C
that
D
which
Whitney Houston’s sudden death suggests that drug abuse is such a serious problem ___________ we should deal with properly.
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A
as
B
that
C
which
D
where