October 15 th is my birthday, ________ I will never forget.
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A
when
B
that
C
what
D
which
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This outdoor training is an exercise , as we know, teenagers' confidence can be built.
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A
which
B
what
C
that
D
where
The new research center will be set up was a wasteland 20 year ago.
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A
in what
B
where
C
in which
D
there
Information has been put forward ________ more middle school graduates will be admitted into universities.
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A
while
B
that
C
when
D
as