my friend is ten years old 改为同义句my friend is a ——— girl
问题描述：
my friend is ten years old 改为同义句
my friend is a ——— girl
答
My friend is ten-year-old
ten years old 和ten-year-old是同义句
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答
答案：My friend is ten./My friend is at the age of ten.
解析：虽然ten-year-old=ten years old，但是ten-year-old只能作定语不能作表语。年龄的简易表示法就是数字。如果你朋友是个女孩或者男孩的话呢，就可以用ten-year-old了。
如：My friend is a ten-year-old girl/boy.
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答
My friend is at the age of ten.
答
my friend is a ten-year boy/girl
答
My friend is ten-year-old