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12、2006年深圳市C 时间________ 正确率________ A stamp is just a piece of paper with a picture and some words printed on one side and some glue on the other side. What makes one of these bits of paper worth any money at all? What makes a ten-fen stamp worth ten fen? When you buy a stamp, you also buy service from the post office. You get the letter sent by post. After the stamp has done its job, the post office says it is worthless. You must buy a new one for each letter you send. But people often pay money for stamps that have already been used. Stamp collectors, or philatelists（集邮家）, have fun just trying to collect as many different kinds as possible. Certain kinds are hard to find. To get one of these uncommon stamps, some collectors are willing to pay a great deal of money. They think it is worth while and that gives it value. If you collect stamps because they are especially beautiful or tell an interesting story, or show all kinds of animals, then those are the ones that have value to you. 61. When you are going to post a letter, you must buy ___________. A. a ten-fen stamp B. a new stamp C. a collected stampD. a valuable stamp 62. The post office says a stamp is useless if ____________. | 
