把笔记放在页脚。

Put the notes at ___the ___foot ___of the page.

每年，来自几乎每个国家的探险队都会在世界最高山的山脚下集合，以征服它。

Every year, expedition groups from almost every country meet at ___the ___foot ___of the highest mountain in the world to conquer it.

他站在楼梯底部，等电梯。

He stood at ___the ___foot ___of the stairs, waiting for the elevator.