When you cut your skin, you bleed(流血). If a person loses a lot of blood, he will become ill and may die. Blood is very important. People have always known that. At one time, some people even drank blood to make them strong!

When doctors understand how blood goes around inside the body, they try ways of giving blood to people who need it. They take blood from the healthy people and give it to people who need it. This is called " blood transfusion（输血）". The blood goes from the arm of the healthy person into the arm of the sick person.

But there are two problems. First, it does not always work. Sometimes people die when they have blood transfusion. Later, doctors find that we do not all have the same kind of blood. There are four groups—O, A, B and AB. We all have blood of one of these groups. They also find that they can give any kind of blood to people of group AB. But they find that they must give A-group blood to A-group people and B-group blood to B-group people. I have O-group blood and the doctor told me that I could give blood to anyone else safely.

There is another problem. To give blood of the right kind, doctors have to find a person of the right blood group. Often they can not find a person in time. If they have a way to keep the blood until someone needs it, they can always have the right kind of blood. At first they find they can keep it in bottles for fifteen to twenty days. They do this by making it very cold. Then they find how to keep it longer. In the end they find a way of keeping blood for a very long time.

We call a place where we keep money a "bank". We call a place where we keep blood a "blood bank". One day, when you grow up, you may decide to give blood to a "blood bank". In this way you may stop someone from dying. Or perhaps one day you may become ill. You may need blood. The "blood bank" will give it to you.

1.From the passage, we learn that sometimes people die when they have blood transfusions because they __________ .

A. are given the cold blood???????????? B. lose too much blood

C. are given the wrong kind of blood????? D. are O-group people

2.Which of the following is true? ________

A. We can drink blood to make us strong.

B. Blood transfusion is always safe.

C. The writer has O-group blood and can give blood to anyone.

D. The blood can only be kept for 15to 20 days.

3.People set up the "blood bank" so that they can _____________ .

A. give the right kind of blood to the people who need it in time

B. keep different groups of blood as much as possible

C. make it easier to sell or buy blood

D. keep blood for more than twenty hundred years

4.From the last paragraph (段落) of the passage, we learn that _____________ .

A. the writer thinks it's good to give blood to a "blood bank"

B. we may become ill if we give blood to a "blood bank"

C. there are many blood banks in the world today.

D. blood is more important than money

5.The writer doesn't talk about ____________ in the passage.

A. how important blood is to us ????????????? ????????????? ????????????? B. the four groups of blood

C. where the blood bank is ????????????? ????????????? ????????????? ????????????? D. what "blood transfusion" is

阅读理解

　　More than 50,000,000 people live in the rainforests of the world and most of them do not hurt the forest they live in. They eat the fruits that grow on the forest trees, but they do not cut them down. They kill some animals to eat, but they do not destroy them.

　　When we cut down the rainforests, we destroy these forest people, too. In 1900, there were 1,000,000 forest people in the Amazon forest. In 1980, there were only 200,000.

　　The Yanomamo live along the river of the rainforest in the north of Brazil. They have lived in the rainforest for about 10,000 years and they use more than 2,000 different plants for food and for medicine. But in 1988, someone found gold in their forest, and suddenly 45,000 people came to the forest and began looking for gold. They cut down the forest to make roads. They made more than a hundred airports. The Yanomamo people lost land and food. Many died because new diseases came to the forest with the strangers.

　　Many forest people try to save their forests. Chico Mendes was famous in Brazil because he wanted to keep the forest for his people. “I want the Amazon forest to help all of us-forest people, Brazil and all the Earth,” he said. A few months later in December 1988, people who wanted to cut down the forest killed Chico Mendes.

　　In Borneo, people were cutting down the forest of the Penan people to sell the wood. The Penan people tried to save their rainforest. They made blockades across the roads into the forest. In 1987, they closed fifteen roads for eight months. No one cut down any trees during that time.

　　In Panama, the Kuna people saved their forest. They made a forest park, which tourists pay to visit.

　　The Gavioes people of Brazil use the forest, but they protect it as well. They find and sell the Brazil nuts, which grow on the forest trees.

1．The number of the people living in the Amazon forest in 1980 was ________ of that in 1900.

[　　]

2．The people who ________ have destroyed the rainforest of the Yanomamo.

[　　]

A．pick fruits and kill animals to eat

B．use plants for food and medicine

C．have live there for about ten thousand years

D．make the roads and the airports

3．Those people built roads and airports in order to ________.

[　　]

A．carry away the gold conveniently

B．make people there live a better life

C．stop spreading the new diseases

D．develop the tourism there

4．Which of the following is wrong?

[　　]

A．The Penan people closed 15 roads with blockades to save their forests,

B．The Penan people were cutting down the trees to sell the wood.

C．The Penan people didn't want other people to destroy their forest.

D．Those who wanted to cut down the trees were stopped at the road blockades.

5．In Panama, visitors have to ________ before they enter the forest park of the Kuna people.

[　　]

6．From the passage, we learn that ________.

[　　]

A．we need wood to build houses, so we have to cut down trees

B．the rainforest people have done something to protest their home

C．to human, gold is more important than trees

D．we mustn't cut down any trees or kill any animals

阅读理解

阅读下面的短文，根据短文内容选择最佳答案．

　　More than 50, 000, 000 people live in the rainforests of the world and most of them do not hurt the forest they live in. They eat the fruits that grow on the forest trees, but they do not cut them down. They kill some animals to eat, but they do not destroy them.

　　When we cut down the rainforests, we destroy these forest people, too. In 1900, there were 1,000,000 forest people in the Amazon forest. In 1980, there were only 200,000.

　　The Yanomami live along the rivers of the rainforest in the north of Brazil(巴西). They have lived in the rainforest for about 10,000 years and they use more than 2,000 different plants for food and for medicine. But in 1988, someone found gold in their forest, and suddenly 45,000 people came to the forest and began looking for gold. They cut down the forest to make roads. They made more than a hundred airports. The Yanomami people lost land and food. Many died because new diseases came to the forest with the strangers.

　　The Yanomami people tried to save their forest, because it was their home. But the people who wanted gold were stronger.

　　Many forest people try to save their forests. Chico Mendes was famous in Brazil because he wanted to keep the forest for his people. “I want the Amazon forest to help all of us－forest people, Brazil, and all the earth,” he said. A few months later, in December 1988, people who wanted to cut down the forest killed Chico Mendes.

　　In Borneo people were cutting down the forest of the Penan people to sell the wood. The Penan people tried to save their rainforest. They made blockades(障碍) across the roads into the forest. In 1987, they closed fifteen roads for eight months. No one cut down any trees during that time. In Panama, the Kuna people saved their forest. They made a forest park which tourists pay to visit.

　　The Gavioes people of Brazil use the forest, but they protect it as well. They find and sell the Brazil nuts(坚果) which grow on the forest trees.

1．The people who ________ have destroyed the rainforest of the Yanomami.

[　　]

A．pick fruits and kill animals to eat

B．use plants for food and medicine

C．have lived there for about ten thousand years

D．made the roads and the airports

2．Those people built roads and airports in order to ________.

[　　]

A．carry away the gold conveniently

B．make people there live a better life

C．stop spreading the new diseases

D．develop the tourism(旅游业) there

3．Which of the following is wrong?

[　　]

A．The Penan people closed 15 roads with blockades to save their forests.

B．The Penan people were cutting down the trees to sell the wood.

C．The Penan people didn't want other people to destroy their forest.

D．Those who wanted to cut down the trees were stopped at the road blockades.

4．In Panama, visitors have to ________ before they enter the forest park of the Kuna people.

[　　]

5．From the passage, we learn that ________.

[　　]

A．we need wood to build houses, so we have to cut down trees

B．the rainforest people have done something to protect their home

C．to humans, gold is more important than trees

D．we mustn't cut down any trees or kill any animals