Ex.4
1. B: Did you go with friends?
A: Yes, we did. lub No, we didn't.
2. B: Did you feel sick last night?
A: No, I didn't.
3. B: Did her brother come to see us?
A: Yes, he did.
4. B: What did you give him?
5. B: Did he wash the frying pan too?
A: No, he didn't.
