Soon he is inside the ____ building where his company has office

Soon he is inside the ____ building where his company has offices.
A、sixty story
B、sixty-story
C、sixty stories
D、sixty-stories
【正确答案】:B
【题目解析】:sixty-story 做定语,可判断此处需要一个定语修饰 building,因此B符合题意