买了一瓶饮料中奖了，髙兴的拿着瓶盖去兑奖。小卖店老板看了看瓶盖，问我还要一瓶吗？我说:好吧！他递给我一瓶，我拧开盖一看，“谢谢品尝”。准备离开。老板慌了：“你钱还没给呢？”“这不是兑奖吗？怎么要付钱？

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