4. Fill in: natural, animal, charity, staff, take care, foster, burst, abandoned.(one extra word)

My best friend works twice a week at the **animal** shelter. He is not a **staff** member. He helps to **take care** of animals and feed them. Some of the animals need more care than usual, so a **foster** home is found for them. It is hard not to **burst** into tears when you see **abandoned** animals. Volunteering is his **natural** choice.