In the study of modern science, there are many cases _____ soldiers can teach officers．
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A
when
B
who
C
which
D
where
推荐题目
A turning point of the continuously high housing price won't appear suddenly because there must be a certain process _ many factors lead to the change．
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A
which
B
what
C
where
D
that
The factory produces half a million pairs of shoes every year,80%________ are sold abroad.
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of them
B
which of
C
of which
D
of that
--- Which hotel did you stay in last week?--- Well, just the one _______I think you once met Ge You and his family.
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A
that
B
which
C
where
D
as
My brother’s bedroom is always a mess, and he can never find anything, _________ is very frustrating.
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A
where
B
whom
C
when
D
which
The school has developed an online system________ students can choose their own teachers.
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A
which
B
when
C
that
D
where