问题补充：
People use money86 food, books, bicycles and hundreds of other things they 87 .When they88 ,they usually get paid in money.
Most of the money used today89 metal or paper. But in ancient times people often used all kinds of things as money. One of the first kinds of money was shells（贝壳）.
In ancient China, cloth and knives90money. Elephant tusks（象牙）,monkey tails（尾巴）and salt were used in some parts of Africa. Rice was also a kind of money used by the ancient people on some islands. Cows and other animals were used as money. too.
The first copper（铜）coins91 China. They were round and had a square（正方的）hole in the center. Different countries have used different metals for their money. Later some countries92 to make coins of gold and silver（银）.But gold, silver and copper were heavy93 when people needed a lot of coins to buy something expensive. The Chinese were the first94 paper money. The first paper money didn’t95 like the paper money we use today.to buy
答案：
(答案→)to buy
解析：
【小题1】考查词组：use sth to do用…做…,因为是用钱买，用to buy
【小题1】they need是定语从句修饰things
【小题1】考查动词：当他们工作的时候，会得到报酬：work
【小题1】考查词组：be made of由…制成因为主语是moneybe动词用is made of
【小题1】考查词组：be used as被用作，因为是In ancient China 主语是cloth and knives 所以be动词是were used as
【小题1】考查词组：be made in制造于…，主语是The first copper（铜）coinsbe动词用was made in
【小题1】考查词组：begin to do开始做，因为是讲的是钱币的历史，所以是过去时began
【小题1】考查句型：主语+形容词+不定式，用to carry
【小题1】考查不定式做定语，to use修饰the first，中国是第一个使用纸币的
【小题1】考查词组：look like看起来象
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