The astronaut did many experiments in the spaceship, ______ much help for knowing space.
#78666
A
which we think it is
B
which we think are of
C
of which we think are
D
I think which is of
推荐题目
Language learning，________ the expert pointed out in his lecture，is more than remembering words and phrases.
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A
as
B
which
C
that
D
what
I’ll spend my holiday in Qinghai, _____ lies in the north of China.
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A
who
B
which
C
where
D
that
Now everyone is concerned about how to conquer the economic crisis, __________is very important for us to preserve our standard of living．
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A
which success
B
its success
C
the success of which
D
the success of it