Past Simple и Past Continuous.
When I came into the kitchen, my mother (to cook).
She (to cook) the whole day yesterday.
We (to wash) the floor in our flat yesterday.
 We (to wash) the floor in our flat from three till four yesterday.
You (to do) your homework yesterday?
You (to do) your homework from eight till ten yesterday?
Why she (to sleep) at seven o'clock yesterday?
 He (to sit) at the table the whole evening yesterday.