46People use money to buy food, furniture，books，bicycles and hundreds of other things they

46 People use money to buy food, furniture，books，bicycles and hundreds of other things they need or want. When they work, they usually get paid in money．
Most of the money today is made of metal or paper． 47 One of the first kinds of money was shells．
Shells were not the only things used as money．In China，cloth and knives were used. In the Philippine Islands, rice was used as money for a long time. Elephant tusks，monkey tails and salt were used as money in parts of Africa．
The first metal coins were made in China, They were round and had a square hole in the centre． 48
Different countries have used different metals and designs for their money． 49 Sweden and Russia used copper(铜) to make their money. Later some countries began to make coins of gold and silver.
But even gold and silver were inconvenient if you had to buy something expensive. Again the Chinese thought of a way to improve money． 50 The first paper money looked more like a note from one person to another than the paper money used today.
Money has an interesting history from the days of shell money until today．A．Today anyone will accept money in exchange for goods and service． B．The first coins in England were made of tin(锡)． C．But people used to use all kinds of things as money．D．Money, as we know, is all made of paper.E．They began to use paper money.
F. People strung(串连) them together and carried them from place to place．
G．No one knows for certain when people began to use money．A

(答案→)A 解析：本文主要是关于钱的发展历史和使用。【小题1】A 下文说人们用钱食物，家具，书，等等 所以开头必须先提出“钱”用来为人们交换物品和服务。 故选A 如今每一个人否勇气来交换货物和服务。【小题2】C 上文说，现在的钱大多数是纸或金属的。 所以对应应填关于过去人们把什么当做钱 C但是人们过去吧所有的东西都当做钱使用【小题3】F 上文说a square hole in the centre，则下文应与这个小洞有关 F人们把他们串联起来，把他们从一个地方带到另一个地方。【小题4】B 下文讲到瑞典人和俄罗斯人用铜做钱。则此处应找“某个国家用某物做钱” B英国的第一个硬币是用锡做的【小题5】E 下文提到了第一张纸币。所以此处应找与“开始使用纸币”有关的 E他们开始使用纸币

就是这个解释