giúp em với ạ 4. We started working on this project a year ago.  We have 5. My brother has been doing his homework since 8pm.  My brother started 6. The doctor began work at six o'clock and is still working.  The doctor has 7. Nancy hasn’t come here since 1989. The last time 8. The last time I got the scholarship was ten years ago. I last 9. It is five years since I last saw her .  I haven’t 10. We haven't seen Ann for years.  It's 11. I haven’t gone to the supermarket for three weeks  The last time 12. I last went to the cinema a long time ago.  I haven’t 13. The last time Nancy came here was in 1996  Nancy hasn’t 14. It’s nearly twenty years since my father saw his brother. à My father hasn’t à The last time 15. The last time I got the scholarship was ten years ago. It’s 16. The last time I played the piano was 10 years ago.  I haven’t 17. Jane last sang that song in 2003  Jane hasn’t