Which flat do you live and which floor do you live ?A. in; onB. on; inC. in; / D. /; on

问题补充：

Which flat do you live and which floor do you live ?

A. in; on

B. on; in

C. in; /

D. /; on

答案：

(答案→)A. in; on

B. on; in

C. in; /

D. /; on

解析：句意：你住在那个公寓里，和那层楼上？住在公寓，用In,住在哪层楼用on，故选A