1. I have lived in Ho Chi Minh city since twenty five years

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2. They haven’t saw such a terrble fire before

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3. the house was cleaned up since we left for Nha Trang

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4. The International Olympic Games continued without interrupt since 1896

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5. We didn’t try hard enough since the second semester

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6. I have known this singer since she has been 16 year old

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7. people enjoyed Beethovan’s music for nearly 200 years

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8. The boy played soccer since 2 o’clock

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9. All my classmates knew each other quite well since they were in grade 6

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10. These dancers performed that ballet qute well many times

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11. When we visited my friends,they had dinner with their children

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12. My father watered the flowers when it was started raining

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13. Lan has met her old friends two days ago

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14. Phong didn’t see that film before

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15. The girls participated in that project twice

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16. people speak English in Australia for a long time

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17. Her father worked in that hospital since he has moved to this city

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18. His sister played piano since she was eight

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19. They didn’t see each other for a long

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20. The girls have finished their project two days ago

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