Probably every town in the United States has a post office. Some are very small, and you may also find them in the (11) _________of a shop. Others are large buildings. They are open five days a week and Saturday morning. From Monday through Friday they are usually open from 8: 30 am to (12) _________.
If you know how much the postage is for your letter, you can buy stamps at any (13) _________ In some post office you can buy stamps from machines. Stamps are sold at many different prices, from one cent to many dollars. If you are not sure (14) _________ postage is for your letter, you can ask the clerk. He or she will give you the stamps you need.
At a post office you can also buy postcards. A postcard is (15) _________ than a letter.