当国歌响起时，我们都站了起来。

We all ___stood up when the national anthem was played.

这个理论在科学家们的仔细推敲下依然站得住脚。

The theory still ___stands up under scientists' scrutiny.

老师总是支持那些被欺负的学生。

The teacher always ___stands up for students who get bullied.

他约了我吃午饭，但最后放我鸽子了。

He promised to meet me for lunch but ___stood me ___up at the last minute.