题目内容
（请给出正确答案）
【C5】
A．chatting and smoked
B．chatting and smoking
C．chatted and smoking
D．chatted and smoked
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更多“【C5】A．chatting and smokedB．chatting and smokingC．chatted and smokingD．chatted and smoked”相关的问题
B．Electronic equipment may harm our health.
C．Electronic equipment may affect children's study.
D．Electronic equipment may affect family relationship.
A．by air
B．by sea
C．by land
D．by telephone and telegraph
Money is used for buying or selling goods, for measuring value and for storing wealth. Almost every society now has a money economy based on coins and bills of one kind or another. However, this has not always been true. In primitive societies a system of barter was used. Barter was a system of direct exchange of goods. Somebody could exchange a sheep, for example, for anything in the market place that he or she considered to be of equal value. Barter, however, was a very unsatisfactory system because people's precise needs were seldom met. People needed a more practical system of exchange, and various money systems developed based on goods that the members of society recognized as having value. Cattle, grain, teeth, shells, feathers, salt, elephant tusks, and tobacco had all been used. Precious metals gradually took over because, when made into coins, they were portable, durable, recognizable, and divisible into larger and smaller units of value.
A coin is a piece of metal, usually disc-shaped, which bears words, designs or numbers showing its value. Until the eighteenth and nineteenth centuries coins were given monetary worth based on the exact amount of metal contained in them, but most modern coins are based On face value—the value that the governments choose to give them, which doesn't show the actual metal content. Coins have been made of gold, silver, copper, aluminum(铝), nickel(镍), lead, zinc(锌), plastic and in China even from tea leaves. Most governments now issue paper money in the form. of bills, which are really" promise to pay". Paper money is obviously easier to handle and much more convenient in the modern world. Checks and credit cards are being used increasingly, and it is possible to imagine a world where "money" in the form. of coins and paper currency will no longer be used. Even today, in the United States, many places, especially filling stations will not accept cash at night for security reasons.
Barter here means______.
A．exchanging goods for money
B．exchanging sheep for anything in the market
C．exchanging goods for goods
D．exchanging money for goods
A．very cold for us to live
B．so cold to us living
C．too cold for us to live
D．rather cold of us live
A．Hard work
B．Being free from trouble
C．Wealth
D．Health
A．what is needed
B．the thing needed
C．that is needed
D．for their needs
A．Having read
B．Have read
C．Reading
D．Read
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