Question

What is done can’t be ____.A) done B) undone C) undo D) undi

Answer 1

B) undone

undo表示撤回,返回到没做的状态.do的被动式是done,同理undo的被动形式是undone.

句子的意思是已经做了的事情是不能被撤回的~也就是说“木已成舟,生米煮成熟饭.”