In 1901,Karl Landsteiner, an Austrian scientist, found that there are four types of blood. These four blood types were named A,B,AB and O. People have one of these four types. Blood type O is the most common around the world. Blood type A is the second most common, and type AB is the least common. If people with type A blood are given type B blood, or people with type B blood are given type A blood, they will probably die.

In 1927,a Japanese doctor, Furukawa Takeji, carried out research and came up with the idea that people with different blood types also had different personalities. He said that people with type A blood are usually calm and serious; people with type B blood are curious, cheerful, and outgoing; people with type O blood are generous(慷慨的）and honest; while those with type AB blood are often caring, creative and careful.

More recently, a doctor in the United States wrote a book that links(聯(lián)系）blood types and what people eat. For example, his book suggests people with type O blood should eat more meat and less bread. A diet for people with type A blood includes more vegetables. His book, Eat Right for Your Type, has been a hit with people who want to lose weight(減肥). However, Dr. Peter D'Adamo believes that eating food that matches a person's blood type can do more than help them lose weight. He thinks it will make the person healthier in other ways, too.

1.What is the passage mainly about?

A.What blood does in our bodies.

B.Why blood types cannot be mixed(混合)

C.Important parts of our blood

D.Three men's studies on blood.

2.What did Karl Landsteiner find?

A.There are four types of personality. B.Blood type O is the most common.

C.There are four types of blood. D.Blood from one person can be given to another.

3.According to the text,people with which blood are the most honest?

A.Type A B.Type B C.Type AB D.Type O

4.What kind of people may want to read Eat Right for Your Type?

A.People who are too heavy. B.Austrian people.

C.People with type O blood D.People who are worried about their blood.

5.What is NOT true about blood type AB?

A.It is the least common.

B.It was found by Karl Landsteiner.

C.People with this type are said to be creative

D.People with this type lose weight easily.

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