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
人气：430 ℃ 时间：2020-05-12 08:19:14
解答
选A,15-year-old意思为十五岁大的,有连字符,它不用变复数的
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