在外面玩完后，孩子们累了，所以他们的母亲给他们脱了衣服，帮他们上床。

After playing outside, the children were tired, so their mother ___undressed them and helped them into bed.

我房间里有一把特殊的椅子，晚上脱衣服时我把衣服放在上面。

I have a special chair in my room where I put my clothes when I ___undress at night.

在一些文化中，进入桑拿房前脱衣服是常见的。

In some cultures, it is common to ___undress before entering a sauna.