Mark was a student at this university from 2006 to 2011，________he studied very hard and was made Chairman of the Students’ Union.
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A
during which time
B
for which time
C
during whose time
D
by that time
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People who seldom do sports or ________ diet is high in fat will put on weight quickly.
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A
who
B
whose
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which
D
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Now there is just one point ________ I wish you to make quite clear.
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where
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which
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that
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which
D
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He had a lot of friends, only a few of ______ were invited to his wedding.
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whom
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them
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D
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