题目内容
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
B
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口算能手系列答案题目内容
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
B
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