Complete the sentences.

1. Cats and dogs are the most common pets in the UK.
2. I’ve only seen animals in zoos or on TV.
3. I don’t like keeping birds in a ; they need more space.
4. I hate ants and mosquitos. In fact, I hate all .
5. It’s hard to see tigers in the wild because they are now .
6. Some animals are disappearing, so we must them.