2 Have they built a new gym? No, they haven't built a new gym. They have built a new swimming pool.
3 Has Sam bought a coat? No, he hasn't bought a coat. He's bought a shirt.
4 Has Julie argued with her parents? No, she hasn't argued with her parents. She's argued with her best friend.
5 Have they learned Spanish? No, they haven't learned Spanish. They have learned Italian.
6 Have you done Exercise 6? No, I haven't done Exercise 6. I've done Exercise 5