Ex 3
2. He was at the theatre. 3. She was at the zoo. 4. They were at the cinema. 5. They were at the cafe. 6. He was at the park.
ex 4.
1. B. Yes, I was at school yesterday.
2. B. Yes, my mother at home on Saturday.
3. B. No, I wasn't your friend last night.
4. B. Yes, I was in bed early on Sunday.