问题
选择题
In a sports team each player has a clear role，and there are few occasions members are confused or uncertain of their roles．
A．which
B．that
C．when
D．how
答案
答案：C
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In a sports team each player has a clear role，and there are few occasions members are confused or uncertain of their roles．
A．which
B．that
C．when
D．how
答案：C