16. 1. Changed 2. trained
3. hunted 4. followed
17. 1. Growing 2. Collecting
3. Catching 4. Raising
18. 1. public 2. private
3. positive 4. popular
19. 1. struggled 2. changed
3. disappeared 4. escaped
20. 1. allowed 2. admitted
3. accepted 4. assigned
21. 1. using 2. recording
3. repeating 4. selecting
22. 1. plans 2. games
3. hobbies 4. Exercises