60．Sir John Sulston got a Nobel Prize for Medicine because he has

　　A．found that human beings are similar to the worn

　　B．got the fact we share 40 per cent 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

　　61．People might be seriously ill if the cells in heir body

　　A．grow without being instructed B．die regularly

　　C．fail to follow people’s instructions D．develop in the human body

　　62．The underlined word “they” (paragraph 5) refers to

　　A．cell deaths B．diseases C．instructions D．cells

　　63．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.

　　C

　　Sports is not only physically challenging, but it can also mentally challenging. Criticism（批评）from coaches(trainers), parents, and other teammates, as well as pressure to win can create too much anxiety or stress for young athletes. Stress can be physical, emotional, or psychological, and research has showed that it can lead to burnout. Burnout has been described as dropping or quitting of an activity that was at one time enjoyable.

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