1. My friend went to the sports ground.
Where did my friend go? - общий
Why did my friend go to the sports ground?
Who went to the sports ground?
Did my friend go to the sports ground or to the fitness club?
My friend went to the sports ground, didn't he?
2) We visited library twice a month.
How often did we visit the library?
What did we do in the library twice a month?
Who visited the library twice a month?
Did we visit the library twice a month or bookstore?
We visited the library twice a month, didn't we?