If nature does not provide man with the necessary material, it is the laboratory ____ he will turn to for it．
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A
where
B
that
C
which
D
what
推荐题目
Maria has written two novels, both of ___ have been made into television series.
#77261
A
them
B
that
C
which
D
what
The knee is the joint ______ the thigh bone meets the large bone of the lower leg．
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A
when
B
where
C
which
D
that
Chinese President visited AIDS patients in Beijing's Ditan Hospital on the World AIDS Day, ________ was on Dec.1,2010, and ______ theme was to give all the AIDS patients medical care.
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A
which; whose
B
which; of which
C
when; whose
D
on which, its