She always looks sad, _____ makes people feel sorry for her.
#77636
A
who
B
which
C
that
D
what
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Recently I have bought an iPad on the website of taobao.com, _______ the price is very reasonable.
#75792
A
which
B
whose
C
on which
D
of which
The knee is the joint ______ the thigh bone meets the large bone of the lower leg.
#78592
A
when
B
where
C
which
D
that