1) We did an examination
We didn't do an examination
Did we do an examination?
2)My brother did business
My brother didn't do business
Did my brother do business?
3) We did our lessons
We didn't do our lessons
Did we do our lessons?
4) My grandma did the gardening
My grandma didn't do the gardening
Did my grandma do the gardening?
5) We did an experiment
We didn't do an experiment
Did we do an experiment?