Câu 1: 1. The sun....(rise) in the east 2. We...(go) canada by air last summer 3. If I find a comfortable flat, I....(buy) it 4. She.....(watch) tv when nam arrived last night 5. He....(drive) that car since I knew him 6. She....(start) to study chinese 2 years ago 7. Lan....(go) to work every day by car 8. Nga...(not go) to work by bike every day 9. My father....(take) me to the park last sunday 10. He...(paint) his house when I arrived 11. They...(build) this school since last year 12. ......( watch) too much tv is not good for our eyes 13. When my mother cane home from work, I....(cook) dinner 14. Jane.... (go) to school by bike everyday 15. The children...(play) badminton in the stadium now 16. You...(go) to london last month 17. The film was very sad. It made her....(cry) 18. London...(have) an underground train system since the nineteenth century 19. If the weather is fine, we ...(have) a party outside 20. The huge earthquake in khobe in 1995 ...(cause) severe damage