1. It has been raining since.
2. My boss will go away for the next ten days.
3. I'm staying in England since 1985.
4. ... for lunchtime.
5. Please hurry up! We have been waiting for an hour.
6. I have known her for 20 years. Since January.
7. Have you learned English for a long time?
8. I haven't seen Tom since we left school.
9. The house is very dirty. We haven't cleaned for years.
10. My sister has been a student for two years.
11. We've lived here since 1990.
12. I haven't seen Linh since my birthday party.
13. She has been away for a year.
14. We've already waited for five days.
15. They haven't had any rain for a very long time.
16. That building has been there since the 19th century.
17. I have known them for many years.
18. They have only been there for a few minutes.
19. My brother works for a company called FPT. He has worked for them since university.