She is nine years old.(改同义句)

问题描述:

She is nine years old.(改同义句)
She is a ——— girl.

填:nine-year-old 额。。。我写的就是这个。。。但是,我总觉得不对相信自己,答案就是这个‘ 由数字与名词组成的复合形容词nine-year -old’ 九岁的‘(相当于一个单词)好吧。。。就你了