Ai giúp mình bài này đc ko ạ TvT
Bài tập:Điền “For” hoặc “Since” vào chỗ trống thích hợp:

1.     It has been raining ..............lunchtime.

2.     My boss will go away ................................... the next ten days.

3.     I’m staying in England ................................... a year.

4.     She has lived in London ................................... 1985.

5.     Please hurry up! We have been waiting ................................... an hour.

6.     I have known her ................................... January.

7.     Nam’s father has worked in this company ................................... 20 years.

8.     Have you learned English ................................... a long time?

9.     I haven’t seen Tom ................................... we left school.

10. The house is very dirty. We haven’t cleaned it ................................... years.

11. My sister has been a student ................................... two years.

12. We’ve lived here ................................... 1990.

13. I haven’t seen Linh ................................... my birthday party.

14. She has been away ................................... a year.

15. We’ve already waited ................................... five days.

16. They haven’t had any rain ................................... very long time.

17. That buildings has been there ................................... the 19th century.

18. I have known them ................................... many years.

19. They have only been there ................................... a few minutes.

20. My brother works for a company called FPT. He has worked for them ................................... he graduated from university.