去原文收听听力
A：I would like to return this pair of shoes.
我想退了这双鞋。
B：Do you have a sales slip?
你有收据吗？
A：Here it is.
给你。
B：Sorry, things on sale are not allowed to be refunded or exchanged.
对不起，减价商品不退不换。
A：Oh, but this pair of shoes are a bit too tight. Could I change them for something bigger?
哦，但是这双鞋有点小，我能不能换一双大一点的？
B：All right. Wait a minute.
好的。请稍等。
