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 The old man often looked back on the past days ________ he worked hard to make a living.
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A
which
B
when
C
where
D
that
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There are several research centers in China ________ a certain disease called Bird Flu is being studied.
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A
which
B
where
C
when
D
what
 — If our government _____attention to controling food safety now, our health _____in danger.
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A
won’t pay, is
B
doesn’t pay, is
C
won’t pay, will be
D
doesn’t pay, will be
However,　　　　 happened later proved me wrong.
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A
what
B
that
C
which
D
no matter what
______ around the Water Cube , we were taken to see the Bird’s Nest for the 2008 Olympic Games.
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A
Having shown
B
To be shown
C
Having been shown
D
To show
 At the beginning of a speech, it is very important to grab the audience’s attention and make them interested in     ________you have to say.    
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A
which
B
what
C
that
D
who