A survey was carried out on the sleep time of students in middle schools, ______ were surprising.
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A
its results
B
whose result
C
the results of which
D
of which results
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They held a meeting ____ they could hear everyone’s idea.
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A
even if
B
now that
C
in case
D
so that
He said he would work it out himself, ________ ask nobody for help. 
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A
and not to
B
but not
C
and prefer not
D
rather than
He behaved           nothing had happened. 
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A
even though
B
because
C
although
D
as though
________ enough time, but I couldn’t do it better. 
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A
I was given
B
Given
C
To be given
D
Though I was given