Ex.4
1. A: Was there a department store in your neighbourhood twenty years ago?
B: No, there wasn't.
2. A: Did Pam buy that pair of jeans yesterday?
B: Yes, she did.
3. A: Did they own the town's bakery ten years ago?
B: No, they didn't. They had a butcher's.
4. A: Did James learn to play the piano when he was 5?
B: Yes, he did.