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
In the survey they listed twelve kinds of food _______would affect the work of the brain．
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A
which the experts believed
B
that were believed
C
the experts believed that
D
the experts believed
(2013·东北四市一模)After visiting Harbin, most of the foreign friends said they would never forget the time ________ they had spent.
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A
that
B
what
C
when
D
at which
Julie was good at German, French and Russian, all of ____ she spoke fluently.
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A
who
B
whom
C
which
D
that
The US is a large country ________ many different dialects are spoken.
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A
what
B
when
C
where
D
which