V. Viết câu hỏi đuôi. 1. The boy didn't play tennis last year, 2. Your sister couldn't swim two years ago, 3. Coffee isn't good for children, 4. My children smoked cigarettes,. 5. We seldom wash our hands before meals, 6. Fred hardly drinks beer, 7. This is your pen, 8. Hellen has to go to bed early,. 9. Get me the tape measure from the sideboard, 10. Don't forget to get up early tomorrow, 11. Daisy and John can speak English very well, 12. These are his pencils, . 13. Let's go to the cinema,. 14. Let's not buy sweets,. 15. Nothing is important for me. ? .? ? ? .? .? .? .? (work) harder. .?