问题补充:
---Did you go to bed early last night?
----No. I watched a movie, so I didn 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:句意:昨天晚上你睡得很早吗?不。我看了三个小时的电影。所以我直到11点才上床睡觉。3-hour为合成形容词,在句中做定语;故选D。