A____boy can sing the English song very well.a.ten-years-old b.ten years old c.ten-year-oldd.tenth years old请说明为什么?

问题描述:

A____boy can sing the English song very well.a.ten-years-old b.ten years old c.ten-year-old
d.tenth years old
请说明为什么?

你好!
C

一个十岁的男孩儿
符合形容词,用连字符链接,并且里面的复数要变成单数

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