Mr smith lives __that building.his flat is__the fifth floor A.in;on B.of;to C.on;in D.to;at

问题描述:

Mr smith lives __that building.his flat is__the fifth floor A.in;on B.of;to C.on;in D.to;at

第一个in
第二个on
其实介词用法很复杂,你就记得固定搭配就行