1:Unless this store sells emergency kits, I’ll check the other one

2:If you throw trash into the river, it will become more polluted

3:The factory is dumping waste in the lake, so it is polluted

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:It was hard to go outside during the heatwave last week

2:Air pollution in big cities can lead to serious health problems

1:It was hard to go outside during the heatwave last week

2:Air pollution in big cities can lead to serious health problems

topic 1:During an earthquake, you should stay calm and follow the drop, Cover, and hold on rule. If you are indoors, you should crawl under a sturdy table and protect your head. However, you shouldn't run outside or use elevators because they are dangerous. If you are outdoors, you should move to an open area away from buildings and power lines. Finally, you shouldn't stand near windows or heavy furniture that could fall

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’ll check the other one

2:If you throw trash into the river, it will become more polluted

3:The factory is dumping waste in the lake, so it is polluted