People use money to buy food, books and lots of other things they need. When they work, they usually get paid in money.

Most of the money used today is made of metal or paper. But in the time long ago, people used to use all kinds of things as money. One of the first kinds of money was shells (贝壳).In China, cloth and knives were used as money. Elephant tusks (牙), monkey tails and salt were

used in some parts of the world. Rice was also a kind of money used by the

people in some islands. Some animals were used as money, too.

The first copper(铜) coins were made in China. They were round and had a square hole in the center. Different countries have used different metals for their money. Later, some countries began to make coins of gold and silver(银). But gold and silver were heavy to carry when people needed a lot of coins to buy something expensive. The Chinese were the first to use paper money. The first paper money looked more like a note from one person to another then the paper money is used today. Money has had an interesting story from the days of shell money till today.

1.What do people use money to do?

A. To play with. B. To keep at home.

C. To buy something useless. D. To buy things they need.

2.From the passage we know that______ weren’t used as money in the world.

A. trees B. elephant tusks

C. monkey tails D. salt

3.What problems did people have using gold and silver coins?

A. They didn’t have much.

B. They were too heavy to carry.

C. They didn’t like them.

D. People couldn’t found them.

4.In the world what kinds of money were first made by Chinese people?

A. Copper coins. B. gold coins.

C. paper money. D. both A and C.

5.How many things that were used as money are mentioned in this passage?

A. 8. B. 9. C. 10. D. 7.

Water pollution happens when waste things from many areas are thrown into rivers,lakes and seas.

Agriculture

To get more food,farmers use large amounts of chemicals(化学制品).When the chemicals are not completely used by the plants,they are washed away by the rainwater into rivers,lakes and seas,which pollute both surface water and underground water.

Industry

Factories and industries often release poisonous chemicals into seas,rivers or lakes,which is quite bad for Mother Nature.An example of industrial sea pollution happened in Japan in the 1950s.A local factory had poured waste water with mercury(水银)into the Minamata Bay for 20 years.Tuna fish in the bay took in the mercury and people ate the tuna. Many children were born with birth deformities(畸形).As a result,people lost their,hearing and sight,and thousands of people died in the end.

Sea transportation

When ships transporting oil get damaged on the way,oil spillage(溢出)happens·One major disaster was the Exxon Valdez oil spill.An oil tanker sink off Alaska in 1989 and leaked(泄漏)oil into the ocean.To save cost,some ships also poured unwanted oil from their engine rooms into the sea,thus polluting the oceans·

Home activities

If the waste from the washing of clothes and dishes are not treated and poured into the sea,they will do harm to the sea life.Some diseases may also spread.Sometimes,rubbish is dumped into the sea.

1.Farmers Use large amounts of chemicals to .

A.have more food B.release poison

C.planting D. plant more crops

2.From the example in Paragraph 3.we learn that .

A.eating tuna fish is sometimes a great danger

B.water pollution is a serious problem in Japan

C.factories and industries should be closed in Japan

D.water pollution can do great harm to people’s health

3.The underlined word“release”probably means .

A.释放 B.吸收 C.生产 D.运用

4.What is the best title for the passage?

A.Industrial water pollution

B.Agriculture water pollution

C.Reasons for water pollution

D.Ways to solve water pollution

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