他昨晚喝得烂醉，完全不记得发生了什么。

He got totally ___wasted last night and can't remember anything.

扔掉这么多食物真是白费功夫。

Throwing away so much food is such a ___waste of effort.

我们花了一整天准备报告，结果客户临时取消了会议，所有努力都白费了。

We spent the whole day preparing the presentation, but the client canceled the meeting at the last minute, so all our effort was ___wasted.