17. Everybody realized the danger, didn't they? 18. Nobody complained, did they? 19. Mary hardly ever cooks, does she? 20. Nothing went wrong, did it? 21. He never takes advice, does he? 22. I am too impatient, aren't I? 23. Don't drop that vase, will you? 24. Let's go out tonight, shall we? 25. Open the door, would you? Exercise 2 1. I'm late, aren't I? 2. Let's have a party, shall we? 3. Don't smoke, will you? 4. He'll never know, will he? 5. I think he's from India, isn't he? 6. They must have stayed up late last night, didn't they? 7. Let's go out, shall we? 8. That is your umbrella, isn't it? 9. Those aren't Fred's books, are they? 10. Something is wrong with Jane today, isn't there? 11. Everyone can learn how to swim, can't they? 12. Nobody cheated in the exam, did they? 13. Nothing went wrong while I was gone, did it?