Most stores in America have return and exchange policies. If, for instance, you buy a shirt and find out when you try it on that it's too small, you can take it back to the store and exchange it for a larger size. At many stores it is also possible to return items for a refund, though there is usually a time limit. Also, not all items can be returned. Books, swimsuits and CDs (if they've been opened), for example, cannot be returned. When you make a purchase, it's always a good idea to find out the store's return and exchange policy.
美国大部份的商店都有退款和更换的规定。举例来说，如果你买了一件衬衫，试穿时却发现太小了，就可以把它拿回店里换大一点的尺寸。很多商店也可以让商品归还以退钱，不过这有时间限制。并非所有的物品都可被退还。例如：书、泳衣和CD(假如它们已经被打开了)就不能被退还。当你在买东西时，通常的好点子就是弄清楚店家退货或退款的规定。
智慧补给站：
1.return n.& vt.归还; 返回; 恢复
例：Please return my book as soon as possible.
(请尽快把书还我。)
2.exchange n.& vt.交换; 交易
例：I'd like to exchange this shirt for one in a larger size.
(我想把这件衬衫换成大一点的。)
3.policy n.政策; 规定
例：What is the government's policy on this issue?
(对这个问题政府的政策是什么?)
4.refund n.退款; 退还
例：If your new radio doesn't work, you should take it back for a refund.
(如果你的新收音机不能用，你应该把它拿回去要求退款。)
5.purchase n.& vt.购物， 采购
例：Henry purchased several items at the jewelry store.
(亨利在那家珠宝店买了几样东西。)
