My uncle lives 105 Huanghe Street. His room is the fifth floor.A. at;onB. at;atC. on;inD

问题补充：

My uncle lives 105 Huanghe Street. His room is the fifth floor.

A. at;on

B. at;at

C. on;in

D. of;to

答案：

(答案→)A. at;on

B. at;at

C. on;in

D. of;to

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