Решение:
Заполним пропуски, преобразуя слова в скобках так, чтобы они соответствовали контексту:
- Animals. They ate food that humans threw away. (THROW)
- Dogs become humans' friends by accident. (NOT BECOME)
- One of the reasons is that dogs are cleverer than other animals. (CLEVER)
- They can learn quickly. (LEARN)
- ... When your dog does do a command, offer a small treat or say “Good dog!” (DO)
Ответ: 1. threw, 2. become, 3. cleverer, 4. learn, 5. do