2)did my parents come at 7 oclock yesterday?
No, my parents didnt come at 7 .....
3)did harry see his ....
No, harry didnt see his...
4)did steve do his...
No, steve didnt do his...
5)did the children buy 15 ...
No , the children didnt buy 15...
6)did tony take his ....
No, tony didnt take his ....
Где многоточие там просто пишешь то же самое что дано в предложении, ну просто переписываешь