Решение:
- Kangaroos are smaller / bigger than bats.
- Crocodiles are shorter / longer than lizards.
- Parrots are quieter / louder than mice.
- Horses are quicker / slower than cows.
- Giraffes are shorter / taller than hippos.
- Bears are stronger / weaker than monkeys.
Ответ: 1. smaller/bigger, 2. longer, 3. louder, 4. quicker/slower, 5. taller, 6. stronger/weaker.