单项选择题

Which of the following can help a person's bones become strong

A．Putting much money in the bank.
B．Getting the right kind of bone-building nutrition and exercise.
C．Snack on chips or slurp soda instead of thinking about vitamins.
D．Standing by the elevator.
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单项选择题
What does the writer worry
A．A cracked shinbone caused by too much running on hard pavement.
B．His suffering from a kind of women's disease at the age of more than 54.
C．His being close to a disease that causes older people to shrink in height and break bones easily.
D．His bones are weaker than average women.
单项选择题
The writer's own experience told readers that ______.
A．they begin to shrink in height and break bones easily as they grow older
B．they can avoid the writer's troubles if they think over them later in life
C．they should ask their parents to set the best examples for them
D．the choices they make now can make a big difference in how they feel later in life
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