Ответ:

Ex. 2

1. years old, 2. years, 3. types of games, years, symbols, 4. athletes, 5. also, 6. coloured rings, continents

Ex. 3

1- judges, 2- flame, 3- career, 4- contestants, 5- drugs, 6- break records

Ex. 4

1. Go, 2. do , 3. play, 4. go, 5. do, 6. play