W e have rules ___home,_____the classroom and ___the road.A in;at;on B at;on;in C at;on ;in

问题描述:

W e have rules ___home,_____the classroom and ___the road.A in;at;on B at;on;in C at;on ;in
D at;in;on

选D
At home
In the classroom
On the road
都是固定搭配