让面包冷却后再切片。

Allow the bread to ___cool before slicing it.

夏天时，许多人喜欢喷泉，因为它们使空气变凉爽。

In the summer many people were delighted by fountains which ___cooled the air.

做饭后，她打开窗户让厨房变凉。

She opened the window to ___cool the kitchen after cooking.