During an earthquake, you should stay indoor and protect yourself. If you are indoors, get under a strong table, protect your head, and stay away from windows or heavy things. If you are outside, move to an flat place . You shouldn’t run or use the elevator because it can be dangerous. If you get hurt, call the emergency sevice and use fist aid kit .

1. It was hard to go outside during the heatwave last week. 2. Air pollution in big cities can lead to serious health problems.

1. Unless this store sells emergency kits, I will check the other one. 2. If you throw trash into the river, it will become more polluted. 3. The factory is dumping waste in this lake, so it is polluted.