Where is your bedroom?It’s the second floor.A. inB. onC. atD. from

问题补充：

Where is your bedroom?

It’s the second floor.

A. in

B. on

C. at

D. from

答案：

A. in

(答案→)B. on

C. at

D. from

解析：A. in在…里面 B. on 在…上面 C. at在 D. from来自；句意：你的卧室在哪里？在二楼。on the second floor在第二楼，是固定搭配，故选B