问题描述：
a 15-year-old b 15-years-old c15-year-olds d15 y
a 15-year-old b 15-years-old c15-year-olds d15 years old he is 40years old and he is 25 years older than his son.he has a boy选哪个
a 15-year-old b 15-years-old c15-year-olds d15 years old he is 40years old and he is 25 years older than his son.he has a boy选哪个
问题解答：
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