-- Did you go to bed early last night?No. I watched a movie so I didn’t go to bed unt

问题补充：

-- Did you go to bed early last night?

--- No. I watched a movie, so I didn’t go to bed until 11 o’clock.

A. 3-hours

B. 3-hours’

C. 3-hour’s

D. 3-hour

答案：

A. 3-hours

B. 3-hours’

C. 3-hour’s

(答案→)D. 3-hour

解析：修饰名词是一个时间长度，通常用“数词-名词”的结构，名词不可使用复数，此

结构相当于一个形容词，故选D。