The astronaut did many experiments in the spaceship, ______ much help for knowing space.
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A
which we think it is
B
which we think are of
C
of which we think are
D
I think which is of
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Living with host families, ________ there may be other college students, gives her the chance to learn more about the new culture.
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A
on which
B
about which
C
in which
D
among which
Jason will never forget about his 18th birthday, saw his being admitted to Harvard.
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A
when
B
which
C
that
D
it
With the help of the collected money, subways can be built sooner and better, _______ brings convenience to citizens.
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A
as
B
what
C
who
D
which
When deeply absorbed in work, _____ he often was, he would forget all about eating or sleeping.
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A
that
B
which
C
where
D
when
Have you ever noticed the house, ________ windows are always closed?
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A
where
B
which
C
when
D
whose