Question

【题目】I think __________ should have enough time to sleep.

A. twelve years old B. twelve-years-old

C. twelve-year-old D. twelve-year-olds

Answer 1

【答案】D

【解析】句意：我认为十二岁的青少年应该有足够的时间睡觉。twelve years old十二岁，表示年龄；twelve-years-old形式错误，year不能用复数；twelve-year-old十二岁的，是一个形容词，应修饰名词；twelve-year-olds代词，指十二岁的青少年。根据句意可知应选D。