I.
1. At this time yesterday we (play) __were playing____ tennis in the schoolyard.
2. At 7:00 pm yesterday i (watch) ___was watching ___ TV.
3. Yesterday while my father (watch) __was watching___ TV, my mother (read) was reading the newspaper, my sister (do) __was doing____ her homework and I (play) ___was playing_____ chess with my friend.
4. What were you doing when I phoned you? I (have) __was having_____ a bath.
5. She (do) ____was doing______ her homework at the time yesterday.
6. Mary (water) ____was watering____ the flowers at 3:00 p.m yesterday.
7. They (visit) __were visiting____ the zoo at ten o'clock yesterday.
8. Peter and I (do) ___were doing____ the exercise at this time last night.
9. Last night my father (feed) ___was feeding__ the pigeons at 7:00.
10. At this time last year we (learn) __were learning_____ English in London.
II.
1. When I (arrive) ..arrived ..at this house, he was still sleeping(sleep) .
2. The light (go) ..went ...out while we (have) were having dinner.
3. Bill (have) ..was having..breakfast when I (stop) ..stopped ..at this house this morning.
4. She (wash) was washing....up when Vinh (arrive) ..arrived..at this house.
5. As we (cross) .were crossing...the Street, we (see) ...saw ..an accident.
6. Tom (see) ..saw....a serious accident while he (stand)was standing at the bus stop.
7. The children (play) ..were playing...football when their mother (come) ...came ... back home.
8. The bell (ring)rang while Tom (take) was taking a bath.
9. He (sit)was sitting in a car when I (see)saw him.
10. We (clean) were cleaning the house when she (come) came yesterday.