EXERCISES1. People believed that the Earth (be) _________ flat on ancient day.2. My brother (join) _________ the army since 1975, but later he (leave) _________ the armyand (begin) _________ to find job in 1985.3. They (build) _________ this company for 10 years.4. A : What (do / you ) _________ ?B : I (cook) _________ dinner.A : Hurry ! I (be) _________ hungry now.5. Tree (grow) _________ more quickly in summer than in winter.6. In 1788, he (write) _________ his last great play in Vienna.7. She (arrive) _________ at Kennedy Airport at 2 o’clock this morning.8. Frank (collect) _________ stamps in his spare time. It’s his hobby.9. At the moment, I (read) _________ chapter four of this book.10. I’d like to borrow this book. (you / read ) _________ it yet ?11. We (be) _________ in this town for a long time. We (come) _________ here 16 years ago.12. No breakfast for Mark, thanks. He (not eat) _________ breakfast.13. The World War II (begin) _________ in 1939 and (end) _________ in 1934.14. I’ll will see him when he (be) _________ here tomorrow.15. The last time I (go) _________ swimming was when we were in Spain.16. The house was very quiet when I (get) ________ home. Everybody (go) _________ to bed.17. I (learn) _________ English for 4 years now.18. By the time he arrived at the party, all his classmates (leave) _________.19. They (live) _________ in London for ten years. Now they (live) _________ in Scotland.20. My father usually (have) _________ tea for breakfast.21. Please don’t make so much noise. I (study) _________.22. Tom (play) _________ tennis every Saturday.23. The water (boil) _________ at 100 degrees Celsius.24. Listen ! I (hear) _________ someone knocking at the door.25. Look ! somebody (climb) _________ up that tree over there.26. They (have) _________ lunch in the cafeteria now.27. Something (smell) _________ good in the kitchen now.28. Why _________ you usually (do) _________ at weekend ?29. My sister (study) _________ English at the moment.30. I (not see) _________ her since last week.31. These students ( study) _________ English for 4 years now.32. We (go) _________ on a picnic in the countryside several times before.33. I (wait) _________ here for her since 5 o’clock and she (not come) _________ yet.34. How long _________ you (know) _________ Tom ?35. The weather generally (get) _________ quite hot in July and August.36. I (watch) _________ the film with my sister last week.37. My father (travel) _________ by air many times in the past.38. _________ you (read) _________ that novel yet ?39. We (study) _________ almost every lesson in this book so far.40. Miss Lan (teach) _________ English in this school since she (graduate) _________ fromthe University in 1990.