Depression is the leading cause of suicide, __    __ in turn is the third leading cause of death among 15 to 24 year olds in the United States.
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A
who
B
which
C
that
D
what
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At the meeting place  of the Yangtze River and Jialing RIiver    ,one of the largest cities in china.
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A
lies Chongqing
B
Chongqing lies
C
does lie Chongqing
D
does l Chongqing lie
At what time do you think________?
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A
will Mary come here
B
Mary will come here
C
is Mary coming here
D
can Mary come here