1.Did you see Nick last week?
Yes,I did
2.Did they ask Mary to help them?
Yes,they did
3.Did the lesson begin at 8 o'clock in the morning?
Yes,it did
4.Did they come home an hour ago?
Yes,they did
5.Did Peter visit his friend yesterday?
Yes,he did
6.Did we return home on Monday?
Yes,we did
7.Did the teacher ask us to translate the text?
Yes,he did
8.Did you see this film last year?
Yes,I did
9.Did they want to know the truth?
Yes,they did