我们在车里备有一个急救箱，以防紧急情况。

We have a first aid kit in the car, ___in ___case ___of an emergency.

手册解释了在停电情况下该怎么做。

The manual explains what to do ___in ___case ___of a power outage.

带把伞以防下雨。

Take an umbrella with you ___in ___case ___of rain.