Question

-- 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

Answer 1

D

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。