问题补充：
---It took us quite a long time to get to the amusement park.
--- I agree with you. 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：“数字-名词-形容词”的结构表示的是复合形容词，一般作定语。在这种结构中应注意两点：一是用连字符，二是名词必须用单数。而在本句中，修饰journey，故应用符合形容词 three-hour，而D中three hours的结构虽然正确，但它不能作定语，一般作表语。所以本题选C。
