It took us quite a long time to get here．It was ________ journey．

A.three-hour

B.a three hour

C.a three-hour

D.three hours

答案及解析： C

解析：

用数词加名词修饰名词时有两种方法：①冠词+数词+连字符+名词的单数形式；

②数词+名词的所有格形式。