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
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The president of the World Bank says he has a passion for China，________he remembers starting as early as his childhood.
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A
where
B
which
C
what
D
when
The science of computer,____ rapid progress has been made, is the most important of all.
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A
to which
B
from which
C
in which
D
of which
Now she is considering taking some weight-loss pills, _______ she thinks will help her become slim.
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A
which
B
that
C
what
D
who
The parks will also honor _________ who helped the survivors as well as who died in the terrible disaster.
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A
them.
B
those
C
ones
D
it