He has made another wonderful discovery, _____ I think is of great importance to science.
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which
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what
C
when
D
that
推荐题目
(2013·正定中学二次月考)Some passersby witnessed the car accident ________ five passengers were killed，a baby included.
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in which
B
which
C
that
D
in that
It’s helpful to put children in a situation _____ they can see themselves differently.
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that
B
when
C
which
D
where
Now there’s a system _________ the waste is disposed of using the principles of ecology.
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when
B
which
C
that
D
where
The engineer __________ my father works is about 60 years old.
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to whom
B
on whom
C
with whom
D
with which
The course about Chinese food attracts over 100 students per year, ________ up to half are from overseas.
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in which
B
for whom
C
with which
D
of whom