【正文】
s. 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(集郵家), have fun just trying to collect as many different kinds as kinds are hard to find. It39。t ( ) 10. Mum, may I got to Betty39。t B. may C. can D. mustn39。t D. can39。s hard to get one of these unmon 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. ( ) 1. When you are going to post a letter, you must buy . A. a tenfen stamp B. a new stamp C. a collected stamp D. a valuable stamp ( ) 2. The post office says a stamp is useless if . A. it is collected B. you get a letter sent by post C. it is old D. it has a postmark on it ( ) 3. When some of the stamps are difficult to find, . A. nobody will try to get them B. they can bee of great value C. everybody would like to buy them D. they will be worthless[ ( ) 4. Which of the following is NOT true? A. The stam