No matter how hard you try，you Can find no parallel existing __________ between them.

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参考答案

答案解析

B
[分析]词义辨析
substitutes代用品，代替者，替代品；而A players演员，比赛者，表演者；B．replacements 归还，复位，交换，代替者，补充兵员；例：temporary replacement临时替换人员；C．centers中心，中央，中锋；D．referees仲裁人，调解人，裁判员；因此B为答案。

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