Today anyone will accept money in exchange for goods and services.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(金属) or paper. But people used to use all kinds of things as money. 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 Phillipine 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.People strung(串联)them together and carried them from place to place.
Different countries have used different metals  and designs for their money. The first coins in England were made of tin(锡).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. They began to use paper money. The first paper money looked more like 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.
【小题1】The main use of money is that _________.

Zhoukoudian is a small village situated about 50 kilometers to the southwest of Beijing. In the 1920s, archaeologists discovered some prehistoric human bones there which changed people’s view of China’s history. They came from an unknown species of man and were the first evidence of human life in China thousands of years ago. The remains were three teeth!
In 1929, a complete skull was also discovered. Eventually, archaeologists found almost 200 items, including six skulls and more than 150 teeth. These discoveries proved the existence of a human species who lived in the area between 700,000 and 200,000 years ago. Four sites where Beijing Man and his relatives lived were discovered on the northern face of Longgushan. They lived in the caves in the area.
However, the life span of Beijing Man was short. About 70% of the people probably died before the age of 14. Fewer than 5% lived to the age of 50. Ashes were found alongside the fossils which showed they had used fire for cooking food and also for light, warmth, and protection against wild animals. This is the earliest evidence of the use of fire anywhere in the world. They also made tools of bones and stones. Unfortunately, when Japan invaded China in 1937, excavations (发掘) at the Beijing Man Site stopped and most of the fossils disappeared, including a Beijing Man skull. After the People’s Republic of China was established in 1949, the work started again.
Zhoukoudian was listed as a World Heritage Site in December 1987. It has not only given us important information about prehistoric Asian societies, but also provided amazing evidence about the process of evolution. Today, parts of the caves have been badly affected by rain. Some areas are almost completely covered in weeds, causing serious damage. Pollution from the nearby factories has also led to the problem. This is a very serious matter and the Chinese Academy of Sciences is trying to raise public awareness of protecting it.
【小题1】Archaeologists _________.

In recent years, the world has made progress in reducing deaths among children under the age of five. A new report says an estimated 6.9 million children worldwide died before their fifth birthday. That compares to about twelve million in1990.
The report says child mortality rates have fallen in all areas. It says the number of deaths is down by at least 50 percent in eastern, western and southeastern Asia. The number also fell in North Africa, Latin America and the Caribbean.
Ties Boerma is head of the WHO’s Department of Health Statistics and Informatics. He says most child deaths happen in just a few areas.
TIES BOERMA: “Sub-Saharan Africa and southern Asia face the greatest challenges in child survival. More than eighty percent of child deaths in the world occur in these two regions. About half of child deaths occur in just five countries—India, which actually takes twenty-four percent of the global total; Nigeria, eleven percent; the Democratic Republic of Congo, seven percent; Pakistan, five percent and China, four percent of under-five deaths in the world.”
Ties Boerma notes that, in developed countries, one child in one hundred fifty-two dies before his or her fifth birthday. But south of the Sahara Desert, one out of nine children dies before the age of five. In Asia, the mortality rate is one in sixteen.  
The report lists the top five causes of death among children under five worldwide. They are pneumonia, diarrhea, malaria and problems both before and during birth.
Tessa Wardlaw is with the U-N Children’s Fund. She is pleased with the progress being made in Sub-Saharan Africa. The area has the highest under-five mortality rate in the world. But she says the rate of decline in child deaths has more than doubled in Africa.
TESSA WARDLAW: “We welcome the widespread progress in child survival, but we importantly want to stress that there’s a lot of work that remains to be done. There’s unfinished business and the fact is that today on average, around nineteen thousand children are still dying every day from largely preventable causes.”
The World Health Organization says one way to solve these problems is to make sure health care services are available to women. In this way, medical problems can be avoided or treated when identified.
【小题1】Since 1990, the number of the children who died before 5 in the world has dropped by about__________.