Do you collect anything？Collecting is a popular hobby with people around the world．Some people collect baseball cards，teapots，or seashells．Others collect some matchbook covers，stamps bottles or dolls．There are almost as many types of collections as there are collectors．

Coin collecting，called numismatics，is one of the oldest and most popular types of collecting．People like learning about coins and their history．They like the challenge of finding rare（稀有）or unusual coins．Some see their collections as a valuable investment．Others just enjoy the beauty and variety of their coins．

There are many different types of coin collections．Some numismatists choose to collect foreign coins．They may focus on a certain country or a certain time period when they begin their collections．Another popular way to collect is to choose a theme and then look for coins that have pictures of the animals，people，or object that fit into that theme．For example，a collector may search for coins with pictures of ships，birds or even famous people．

Some collections can become very valuable．This depends on several factors：the type of the coin，the rarity of the coin，and the need for the coin．If you own a rare coin that few people are interested in，it will be worth less than a rare coin that many people want to own．

Condition also plays an important role in deciding a coin's value．Serious collectors store their coins very carefully in special boxes．They touch their coins with special gloves．If you owned a Liberty Head coin from 1913，which is worth about one million dollars，you would probably be willing to give it special treatment，too!

If you are interested in starting a coin collection，the best thing to d is learn a little about it first．You can find books about coin collecting at the library，and you'll learn how to decide the value of various coins and store your collection properly．The next time you look through the coins in your pocket or in your piggy bank，you might find that you have the beginning of a very interesting hobby!

47．The underlined word"numismatists"in paragraph 3means　　．

A．stamp collectors   

B．doll collectors

C．coin collectors     

D．teapot collectors．

48．According to the last paragraph，you will probably　　．

A．decide where to buy rare coins

B．find the right time to collect

C．learn how to look through your coins

D．know the value of different rare coins

49．Which of the following it TRUE？　　

A．Coin collecting is the oldest and most popular type of collecting．

B．Some collectors store their coins carefully to keep them in good condition．

C．The value of a rare coin completely depends on how many collectors need it．

D．If you are interested in coin collecting，the first thing to do is find a rare coin．

50．What is the passage mainly about？　　

A．The collection of coins．

B．The types of coin collection．

C．The value of rare coins．

D．The suggestions of coin collection．