阅读理解。 When you cut your skin, you bleed

问题：

阅读理解。

     When you cut your skin, you bleed (流血). If a person loses a lot of blood (血液), 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 unhealthy people

B. have lost a lot of blood

C. are not given the right kind of blood

D. are AB-group people

2. Which of the following is true? [ ]

A. Doctors can give any kind of blood to the writer.

B. The writer can give blood to B-group people.

C. The writer has never had a blood transfusion

D. The writer has the same kind of blood as his father.

3. People set up (建立) 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 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. many people died because they lost a lot of blood

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