1.You may get a loyalty card if you often go to the same store.You can earn points for special gifts.
2.Some shops give out coupon so you can get a discount or special offer
when you come next time.
3.You may look for a bargain when you go shopping ,so you may pay less.
4.You get a receipt when you buy something.It shows how much you paid.
5.People bid online to buy something at a price they are willing to pay for.
6.Some shops allow you to exchange for another size or colour of the same item you buy.
正确英语应为：change, 原题有问题.
7.When there is a promotion during holiday, you can enjoy special offers or discounts when you go shopping.
8.In an auction, people compete against other people who want
to buy the same item.
9.Some shops offer a discount in a period of time so you can pay less to buy something.
