Unit 4 Calamities and Rescues The photos are all related to Calamities and Rescues. Describe them to your classmates with the help of the following question 2. What are technological calamities? Give examples 3. What basic skills do you need to become a first-aid worker? To Passage A Home To Passage 3日Unit 4 Calamities and Rescues The photos are all related to Calamities and Rescues. Describe them to your classmates with the help of the following question. 1. What are natural calamities or disasters? Give examples. 2. What are technological calamities? Give examples ? 3. What basic skills do you need to become a first-aid worker?