题目内容：

on top of与at the top of
体会on top of the hill
at the top of one`s voice

优质解答

on top of:在...之上例句与用法:1.There is a vane on top of the building.在大楼的顶端有一只风信旗.2.He watched the game from his perch on top of the wall.他在墙头居高临下看比赛.3.On top of borrowing 50,...