单项选择题

People might be seriously ill if the cells in their body ______.

A．grow without being instructed
B．die regularly
C．fail to follow people's instructions
D．develop in the human body
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单项选择题
Sir John Sulston got a Nobel Prize for Medicine because he has ______.
A．found that human beings are similar to the worm
B．got the fact we share 40 percent of our genetic structure with the simple worm
C．found the computer which controls each of the cells in the human body
D．proved that cell death is programmed
单项选择题
What is the subject discussed in the text
A．The theory of programmed cell deaths.
B．A great scientist-Sir John Sulston.
C．The programmed human life.
D．Dangerous diseases.
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