A．People can live to 122．    B．Old people are creative．

55．What does the story of Jeanne Calment prove to us?

    Won’t new anti―aging techniques keep us alive for centuries? Any cure，says Miller，for aging would probably keep most of HS living until about 120．Researchers are working on treatments that make the life span of mice longer by 50 percent at most．So，if the average（平均）human life span is about 80 years，says Miller，“adding another 50 percent would get you to 120．”

  So what can we learn from this little disagreement among the researchers? That life span is flexible（有弹性的），but there is a limit，says George Martin of the University of Washington．“We can get flies to live 50 percent longer．”he says．“But a fly’s never going to live 150 years。”Of course，if you became a new species（物种），one that ages at a slower speed，that would be a different story，he adds．

    Does Martin really believe that humans could evolve（进化）their way to longer life?“It’s pretty cool to think about．”He says with a smile．

    Steve Austad at the University of Texas agrees．“People can live longer than we think．”he says．“Experts used to say that humans couldn’t live past 110．When Calment blew past that age，they raised the number to 1 20．So why can’t we go higher?”

  The trouble with guessing how old people can live to be is that it’s all just guessing．“Anyone can make up a number．”says Rich Miller at the University, of guessing Michigan．“Usually the scientist who picks the highest number gets his name in Time magazine．”

    When it comes t0 long life，Jeanne Calment is the world’s record holder．She lived to the ripe old age of 122．So is 122 the upper limit（限制）to the human life span（寿命）?If scientists come up with some sort of pill or diet that would slow aging，could we possibly make it to 150―or beyond?

    Researchers don't entirely agree on the answers．“Calment lived．to 1 22，So it wouldn't sul33rise me if someone alive today reaches 130 or 135，”says Jerry Shay at the  University of Texas．

    Jeanne Calment took up skating at age 85，made her first movie appearance at age 114．and held a concert in the neighborhood on her 121 st birthday．

54．Who is the article meant for?

    A．School lunch suppliers．    B．Headmasters．

    C．Students．                 D．Nutritionists．

C

    A．Food served in the US is the best of a11．

    B．Schools should try to satisfy the needs of students．

    C．Schools serve different foods from country to country．

    D．School children all over the world dislike their school food．

53．What is the main idea of the passage?

52．We can infer from the passage that

A．a typical menu from a US school is made up of enough nutrition

B．most students in South Africa eat their lunches at home

C．many schools in Australia have traffic lights outside their schools

D．you can have whatever you like in school canteens in Japan