III. 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.