He is 16 years old.He is 16-year-old哪一句对

He is 16 years old.He is 16-year-old哪一句对 He is a 16-year-old boy He is a 16 years old boy这两句哪一句对啊、 He is eleven years old,对eleven years old, He is eleven years old同义句 He is fourteen years old同义句He is () () boy he is a 6-year-old boy.可以说he is a 6 years old boy吗 peter was ten years old last year .How old is he now?He is （ 英语句型转换Jackson is 16 years old.Mike is 14 years old.(合并为一句）He Is he( ) 14 years old? He is twelve years old. he is 18 years old.为什么year要加S he is one ---- old .横线上填year还是years