II did or was/were
1.I ------- go to school yesterday.
2.They---- writing a letter when I came.
3.Where----- you watching new film when I phone you?
4 .----- Mary build a new house last year?
5.She----- doing her homework at 6 o’clock yesterday.
6.What---- you doing at 2 o’clock yesterday?

1.I did go (went) to school yesterday. 2.They were writing a letter when I came. 3.Where were you watching new film when I phone you? 4 .Did Mary build a new house last year? 5.She was doing her homework at 6 o’clock yesterday. 6.What were you doing at 2 o’clock yesterday?