问题补充：
It took us quite a long time to get to the amusement park. It was journey.
A. three hour
B. a three-hours
C. a three-hour
D. three hours
答案：
A. three hour
B. a three-hours
(答案→)C. a three-hour
D. three hours
解析：“到达公园花费了我们很长的时间，这是一段很长的路程。”three-hour相当于形容词的作用“三小时的”
