lucy is a（）girl.我认为eight-year-old与13-year-old都对,为什么答案选择后者

lucy is a（）girl.我认为eight-year-old与13-year-old都对,为什么答案选择后者 is a （）girl.答案是13-year-old为什么eight-year-old不对 she is an eight years old 还是she is an eight-year-old girl对 为什么是she is an eight-year-old girl?she is an eight-years-old a girl of 后面加eight years old还是eight-year-old?为什么,麻烦详细一点 She is an eight-year-old girl与She is 8 years old的同义句. 是a eight-year-old 还是an eight-year-old She is a seven year old girl he is ____boy 1.a eight-year-old 2.an eight-year-old 3.an ei She is an eight-year-old girl.=she is a girl__________ _____ 80 years old与80-year-old的区别.如：Kate is a 14-year-old girl.与Ka She is a 13-year-old girl from England.