– Could you tell me where I can get a dictionary?– Take the escalator. The bookstore is on

问题补充：

– Could you tell me where I can get a dictionary?

– Take the escalator. The bookstore is on the floor of the 5-floor building.

A. first B. third C. ninth

答案：

解析：A. first第一，B. third第三，C. ninth第九。Take the escalator.乘电梯，一楼不用乘电梯。又根据5-floor building.五层的建筑物，所以没有第九层。几层用序数词表示。句意：你能告诉我我在哪里能拿到字典吗？坐电梯，书店在三楼。故选B。