The freezing point is the temperature __________ water changes into ice.
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atwhich
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when
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inwhich
D
ofwhich
推荐题目
They ask about the things and teachers ______ they still remembered in the school.
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which
B
that
C
whom
D
who
Whitney Houston’s sudden death suggests that drug abuse is such a serious problem ___________ we should deal with properly.
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as
B
that
C
which
D
where
The school has developed an online system students can choose their own teachers.
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A
which
B
that
C
whom
D
where
The latest UK official studies show _______fewer teenagers are now studying foreign languages.
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what
B
which
C
that
D
Whether
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