Ex.4
1. Did Dad cook spaghetti last night?
Yes, he did.
2. Was the weather warm and sunny?
No, it wasn't.
3. Did the students like their new teacher?
Yes, they did.
4. Did you know everyone at the party?
No, I didn't.
5. Were they at school two days ago?
No, they weren't.
6. Did you and Sam buy these souvenirs yesterday?
Yes, we did.
