(2013·吉林市期末，33)I'm told that languagepractising.com is a free website ________ learners can not just learn various languages but also chat online.
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A
where
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which
C
that
D
what
推荐题目
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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during which time
B
for which time
C
during whose time
D
by that time
The book, ___________ is green, has been lent to my brother.
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of which cover
B
the cover of which
C
whose covers
D
its cover
We went to the Lincoln Memorial yesterday, ___, not surprisingly, was crowded with visitors from all over the world.
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where
B
which
C
that
D
when
The road construction is based on the agreement, one of _______ purposes is to ensure its completion on time.
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A
which
B
whose
C
that
D
what