．What are their research findings based on?
A．An examination of farmers in northern Japan.
B．Tests given on a thousand old people.
C．Using computer technology.
D．Examining the brain volumes of different people.
73．The doctor’s tests show that .
A．our brains contract as we grow older.
B．one part of the brain does not contract.
C．sixty-year-olds have better brains than thirty-year-olds.
D．some people’s brains have contracted earlier than other people’s
74．Which of the following are growing old earlier than people who live in the cities according to the passage.
A．Farmers. B．Office clerks.
C．Shop assistants. D．Bus drivers.
75．What’s the most possible conclusion of the passage?
A．Most of us should take more exercise.
B．It’s better to live in the town.
C．The brain contracts if it is not used.
D．The more one uses his brain, the sooner he becomes older.
第二卷（共35分）
第四部分：写作(共两节，满分35分)
