Сответом fill in the proper auxiliary verb 1) in the reading room 2) you stay when you were in paris? 3) wow! a new house! 4) know the answer to this question 5) go after school tomorrow? 6) doing at this time yesterday?

They are working in the reading room.
Where did you stay when you were in Paris?
Wow! You have built a new house!
I don't know the answer to this question.
Where will you go after school tomorrow?
What were you doing at this time yesterday?