Question

【题目】Jim is only an boy ,but he knows many things .

A. eight years oldB. eight-years -old

C. eight-year-oldD. eight-years old

Answer 1

【答案】C

【解析】

句意：吉姆只是一个八岁的男孩，但是他知道很多事情。复合形容词的构成：基数词+连字符号+名词单数+连字符号+形容词。排除B,D；eight years old不能用作定语来修饰名词，只能作表语，eight-year-old可以放在名词的前面作表语，故答案为C。