Past Simple/ Past Continuous

What program _______ you _____________ (to watch) at 5 o`clock yesterday?

They _____________ (to watch) an interesting film when their parents _______ (to come) home yesterday.

He ___________________ (to write) the exercise while his mother ______________ (to cook) dinner at 7 p.m. yesterday.

Everybody ______________ (to leave) the classroom when the lesson was over.

Where ___________ you ______________ (to buy) this book?

Tom ________________ (to play) computer games when his friend ____________ (to telephone) him yesterday.