12. It took us quite a long time to get here. It wasjourney.A. a three-hour B. a three hou

问题补充：

12. It took us quite a long time to get here. It wasjourney.

A. a three-hour

B. a three hour

C. three hour

D. three hours

答案：

(答案→)A. a three-hour

B. a three hour

C. three hour

D. three hours

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