When you cut your skin, you bleed (流血). If a person   1   a lot of blood, he will become ill and may   2  . Blood is very important. People have always known that. At one time people even drank blood   3   themselves   4  .    When doctors understand   5   blood goes around inside the body, they try ways of giving blood to people   6   need it. They take blood from the healthy people and give it to people who need it. This is called “blood translation”. The blood goes from the arm of the healthy person   7   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   8   kind of blood. There are four groups O, A, B and AB. We all have blood of one of these groups. They   9   find that they can give   10   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   11  .

There is   12   problem. To give blood of the right kind, doctors have to find a person of the right blood group. Often they can’t 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 keep it in bottles for fifteen to twenty days. They do this by making it very old. Then they find how to   13   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.  14    you may stop someone   15   dying. Or perhaps one day you may become ill. You may need blood. The blood bank will give it to you.

(  ) 1. A. lose      B. loses      C. losing       D. will lose

(  ) 2. A. dead     B. be died     C. die         D. death

(  ) 3. A. made      B. making     C. makes       D. to make

(  ) 4. A. strong     B. strongly      C. more strongly   D. weakly

(  ) 5. A. what      B. when       C. why        D. how

(  ) 6. A. /       B. it        C. which       D. who

(  ) 7. A. in      B. on        C. into       D. onto

(  ) 8. A. same     B. different     C. /        D. the same

(  ) 9. A. too      B. either      C. neither      D. also

10.(  )A. all       B. both       C. either       D. any

11.(  )A. safety     B. safe       C. safely      D. more safe

12.(  )A. the others   B. other      C. the other     D. another

13.(  )A. let       B. make      C. find         D. keep

14.(  )A. On the way   B. In this way   C. By the way     D. In a way

15.(  )A. on      B. in       C. from       D. to

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