选词填空
carry，so, work, begin, need, be made of , finish, be made in ,use, buy ,look ,be used as |
People use money ____ food, books, bicycles and hundreds of other things they ____ .When they ____ ,they usually get paid in money.
Most of the money used today____ 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 knives ____ money. 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）coins ____ 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 countries ____ to make coins of gold and silver（银）.But gold, silver and copper were heavy ____ when people needed a lot of coins to buy something expensive. The Chinese were the first ____ paper money. The first paper money didn't ____ like the paper money we use today.
