---- Have you heard of the North Korea’s...

请以"Why are Bicycles so Popular in China?"为题，根据下列要点用英语写一篇100词左右的短文。

1. 大多数中国人居住的地方离上班或上学的地点不远，骑自行车很方便。而且，骑自行车是锻炼身体的好方法。

2. 自行车是一种很方便的交通工具(means of transportation)，骑自行车做短途旅行，想到哪都可以。

3. 骑自行车可以节省能源，减少空气污染。

71  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.    72 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. 73    Different countries have used different metals and designs for their money. 74  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.  75   The first paper money looked more like a note from one person to another than the paper money used today.

Money has had an interesting history from the days of shell money until today.

E. Money, as we know, is all made of paper.

F. They began to use paper money.

G. Today anyone will accept money in exchange for goods and services.

To their surprise, the boy’s wound was left ______.

— I think you should phone Jenny and say sorry to her.

—________. It was her fault.

— We had ________ really cold February this year.

－I can’t remember ________ spring when it snowed in Changzhou .