问题描述：
他是个15岁的男孩用英语怎么说?下面哪个是对的
A.He is a fifteen year old boy
B.He is a fifteen years old boy
C.He is a fifteen-year-old boy
D.he is a fifteen-years-old boy
A.He is a fifteen year old boy
B.He is a fifteen years old boy
C.He is a fifteen-year-old boy
D.he is a fifteen-years-old boy
问题解答：
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