You don't need ( ) for his permission every time you want to l

You don't need ( ) for his permission every time you want to leave the room.
A、to ask
B、ask
C、asking
D、being asked
【正确答案】：A
【题目解析】：need to do sth. Need 作为普通动词使用，句子含义是每次离开房间时，你没有必要去询问他的许可。