In a sport team each player has a clear role，and there are few occasions ___________ members are confused or uncertain of their roles.
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A
why
B
that
C
when
D
in which
推荐题目
The old town has narrow streets and small houses ______ are built close to each other.
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A
they
B
where
C
what
D
that
It is recognized that the part ___ the UN plays in international relations is important.
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A
in which
B
where
C
that
D
of which
Many grocery stores use misting, a process ________ vegetables are sprayed with water, to keep vegetable fresh.
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A
which
B
that
C
what
D
where
He gave us another piece of advice, ________ of great help to the research work.
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A
which I think is
B
which I think it is
C
I think which is
D
I think it is
In 2009 many countries are going through financial crisis，________has a great effect on many walks of life.
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A
it
B
which
C
that
D
what