她等到咖啡冷却下来，然后喝了一小口。

She waited until her coffee had ___cooled ___down and then took a sip.

我们去游泳凉快一下。

We went for a swim to ___cool ___off.

她用湿毛巾给孩子降温。

She ___cooled ___off the child with a wet towel.