第19题: [单项选择]Although the two players are ______ on the tennis court, they are really good friends. A. partners B. enemies C. rivals D. companions 参考答案:C 答案解析:rivals意为“竞争对手”更符合题意,句中Although(虽然…但是)是转折连词,后半句说他们是好朋友,那么前半句肯定说他们不是朋友。A、D二项可以马上排除,B项enemies意为“敌人”,言重了