Điền cụm từ với “for”, “since” hoặc “ago”. 1. The phone last rang at four o’clock. ~ So you’ve had no calls _____? 2. I haven’t been to the dentist for ten years. ~ You last went to the dentist_____? 3. I last saw Rita on Sunday. ~ Haven’t you seen her _____? 4. We’ve had six weeks without rain. ~ Yes, it hasn’t rained_____ 5. It’s three years since Lisa got married. ~ Really? Has she been married_____? 6. It’s eight months since my sister had any work. ~ He lost his job_____? 7. Mrs. Brown was taken ill three weeks ago. ~ You mean she’s been ill_____, and nobody’s told me! 8. I got here an hour ago. ~ What! You mean you’ve been waiting  _____an hour? 9. I have not seen him_____ he was 16. 10. I've known him  _____ages. 11. Things have changed a lot_____ our previous meeting. 12. It's been raining_____ four o'clock. 13. I'm sure he's been watching us _____we came in. 14. He'd been here_____ over an hour when we arrived. 15. I've been trying to fix this computer_____ early this morning. 16. He hasn't had anything to eat _____ nearly a week. 17. It's three years_____ he started learning German. 18. He's been collecting stamps_____ the past twenty years. 19. Nobody has seen him_____ last Friday. 20. It has been foggy _____ some days. 21. He has been fishing_____ six o'clock. 22. They've been living in France _____ eight years. 23. The pilots have been on strike _____ two months. 24. We've had terrible weather _____ Saturday. 25. I've known Tom _____ 1990.