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<b>1. Bài tập áp dụng</b>

<b>Exercise 1: Chia dạng đúng của động từ của thì trong ngoặc ở thì thích hợp.</b>

1. At this time yesterday we (play) tennis in the schoolyard. 2. At 7 p.m yesterday he (watch) TV.

3. Yesterday while my father (watch) TV, my mother (read) the newspaper, my sister (do) her homework and I (play) chess with my friend.

4. What were you doing when I phoned you? I (have) a bath. 5. She (do) her homework at the time yesterday.

6. Marry (water) the flowers at 3 p.m yesterday. 7. They (visit) the zoo at ten o'clock yesterday. 8. Peter and I (do) the exercise at this time last night. 9. At 7 p.m last night my father (feed) the pigeons. 10. At this time last year we (learn) English in London.

<b>Exercise 2: Chia dạng đúng của động từ trong ngoặc ở thì quá khứ đơn và quá khứ tiếp diễn.</b>

1. When I (arrive) at this house, he still (sleep) 2. The light (go) out while we (have) dinner.

3. Bill (have) breakfast when I (stop) at this house this morning. 4. When I (come) to his house, he (work)

5. As we (cross) the street, we (see) an accident.

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6. Tom (see) a serious accident while he (stand) at the bus stop. 7. The children (play) football when their mother (come) back home. 8. The bell (ring) while Tom (take) a bath.

9. He (sit) in a car when I (see) him.

10. We (clean) the house when she (come) yesterday.

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