She is an _____ girl.[A.eight years oldB.eight-years-old]

She is an _____ girl.[A.eight years oldB.eight-years-old] 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 She is eight years old. She is an eight-year-old girl与She is 8 years old的同义句. Sharon is an eight-years-old girl的同义句 My sister is a beautiful girl.she is eight years old.（合并） My silina is a girl .she is eight years old.合并为一句话 She is only eight years old () she knows a lot. She is an eight-year-old girl.=she is a girl__________ _____ the girl is eight years old.改为同义句 This girl is only eight years old.(同义句)