I. Give the correct form of the verb.
1. At this time last year, they (build) __________ this house.
2. I (drive) __________ my car very fast when you (call) __________ me.
3. I (chat) __________ with my friends while my teacher (teach) __________ the lesson yesterday.
4. My father (watch) __________ TV when I (get) __________ home.
5. At this time yesterday, I (prepare) __________ for my son’s birthday party.
6. What you (do) __________ at 8 pm yesterday?
7. Where you (go) __________ when I (see) __________ you last weekend?
8. They (not go) __________ to school when I (meet) __________ them yesterday.
9. My mother (not do) __________ the housework when my father (come) __________ home.
10. My sister (read) __________ books while my brother (play) __________ football yesterday afternoon.