Question

【题目】 A __________________ boy was saved from the fire last week.

A. 9 year old B. 9-year-olds

C. 9-year-old D. 9-years-old

Answer 1

【答案】C

【解析】句意：上周一个九岁的男孩被从那场大火中救了出来。9-year-old意为＂九岁的＂，为复合形容词，复合形容词的数词、名词和形容词之间要用连字符连接，且数词后的名词要用单数形式，故选C。