Mọi người giúp mình với ạ Complete the sentences using the words in parentheses. 1. Animals.............(should / train) with a combination of firmness and affection. 2. Dogs are usually used to help people with disabilities but I have heard that other animals................ (can / use) as well. 3. Gina’s dog.................(might / not / find) because it wasn’t wearing its dog tag with Gina’s phone number on it. 4. With all the new technology that is available in medical science, why do animals still........... (have to / use) for research? 5. I don’t believe that any animal............(should / keep) in a cage. That’s why I hate zoos. 6. The illegal hunting of wildlife.............(must / prevent) or else some important species will disappear. 7. Sang’s dog............. (could / be) better trained. It never obeys her. 8. A lot more............(could / do) to improve conservation efforts for chimpanzees.