Complete the following passage with the words or phrases
in the box. Each can only be used once. （将下列单词或词组填入空格. 每空格限填一词，每词只能填一次）
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A.
carried out B. probably C.
character D.
hobbies E.
common
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Until the early twentieth century, it was always unsuccessful to
transfuse blood（输血） from one person to another person. Then in 1901, Karl Landsteiner,
an Austrian
scientist, discovered 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{#blank#}1{#/blank#} around the world because the number of the people with type
O is the largest, while type AB is the least.
If people with type
A blood are given type B blood, or people with type B blood are given type A
blood, they will{#blank#}2{#/blank#} die. Karl Landsteiner's research made it
possible to be sure that people who need blood get the correct type.
The study of blood didn't stop.
In 1972,
a Japanese doctor,
Furukawa Takeji,
{#blank#}3{#/blank#}
another research about blood. And he came up with the idea that it
was possible to tell one person's {#blank#}4{#/blank#}only by his blood type,
which can help you
know about the person quickly.
