I'm not sure if I'm going to Tom's party;I may go to the concert___

问题描述:

I'm not sure if I'm going to Tom's party;I may go to the concert___
A.only B.instead C.early D.late
请问为什么?

翻译即:“我不确认我去不去汤姆的宴会;我有可能去听音乐会.”B在此处表示代替 "go to Tom's party"这一动作.即''I may go to the concert instead of going to Tom's party."(我可能要去音乐会而非去汤姆的宴会)....