A：I'm afraid I have to return this sweater.恐怕我得把这件毛衣退掉。
B：May I ask if there's anything wrong with it?请问毛衣有什么毛病吗?
A：You see,there is a run at the neck.你看，脖子这块脱针了。
B：Oh,sorry.But do you want to change it for another one?哦，对不起。你想换一件吗?
A：No,thank you.不想换，谢谢你。