她在法律文件的底部签上了自己的名字。

She placed her signature ___at ___the ___foot ___of the legal document.

一座小村庄坐落在雪山脚下。

A small village lies ___at ___the ___foot ___of the snow-capped mountain.

他总是把鞋子放在楼梯底部。

He always leaves his shoes ___at ___the ___foot ___of the stairs.