Is that the fish _______ _______ you asked the waiter?答案是for which吗?

Is that the fish _______ _______ you asked the waiter?答案是for which吗?
Is that the fish _______ _______ you asked the waiter?答案是for which吗?

Is that the fish _______ _______ you asked the waiter?答案是for which吗?
是的 因为ask sb for sth 这是一个定语从句

是的

ask for 是固定搭配，这里是把for提前到which引导的定语从句前面。