It is sometimes difficult to get change without buying something, so it's a good idea to carry change with you at all times. If you need change, you can buy something inexpensive like candy or a newspaper and ask for the coins you need.
没有买东西的时候通常很难换零钱，所以最好的办法是总带着零钱在身边。如果你需要找零，你可以买一些诸如糖果或者报纸之类的便宜的东西，并且要求找你需要的硬币。
1.A: Excuse me, but could you give me some change?
B: Let me see. Are dimes and quarters OK?
A: I want to make a long distance phone call.
B: Then you'll need small change.
A: 不好意思，你可以给我找些零钱吗？
B: 让我看看。10分铸币或两角五分的硬币行吗？
A: 我想要打一个长途电话。
B: 那你就需要找小的零钱了。