Exercise 4: Dùng ‘since’ hoặc ‘for’ để hoàn thành câu trả lời 1. How long have you lived in the USA? – I have lived in the USA … three year. 2. How long has Marie been a nurse? – She has been a nurse … August. 3. How long has Kai known Tom? – He has known Tom … 1997. 4. How long have they studied Math? – They have studied Math … a few months. 5. How long has Kang played soccer? – He has played soccer … a long time. 6. How long has he worn glasses? – He has worn glasses … 1998. 7. How long has Emily played the piano? – She has played the piano … high school. 8. How long will you be on vacation? – I will be on vacation… three months. 9. How long have you driven a motorbike? – I have driven a motorbike … my birthday. 10. How long has Ron had his new mouse? – He has had his new mouse … last month. 11. How long has she owned the book store? – She has owned the book store … ten years. 12. How long has Gary played basketball? – He has played basketball … several years. 13. How long have your friends been in town? – They have been in town … Monday. 14. How long has Mrs. Smith lived on Shing Street? – She has lived on Shing Street … many years. 15. How long has the post office been closed? – It has been closed … six o’clock.