单项选择题
A.you buy it B.you write a letter C.put a letter into a postbox D.it has a postmark on it
A.a ten - fen stamp B.a new stamp C.a twenty - fen stamp D.a stamp worth 10 fen or more
A.Some stamps have a flower or animal on one side. B.Along with a picture on one side, there are also some words. C.Some used stamps can be worth a lot of money. D.A stamp, when used, is worth more than a new one.