1 A: Did he leave (he/ leave) at 9 a.m.?
B: Yes, he did.
2 A: Did your dad cook (your dad / cook) dinner last night?
B: No, he didn't.
3 A: Did your mum have coffee for breakfast?
B: Yes, she did.
4 A: Did he go to school yesterday?
B: Yes, he did.
5 A: Did they arrive at 3 p.m.?
B: No, they didn't.