1. (Are you doing/ Have you done/ Has you done/ Do you do) your homework yet? 2. Yes, I (am doing/ have done/ do/ did) it already. 3. Dickens (has written/ writes/ wrote/ is writing) a lot of novels. 4. Her mother (has written/ writes/ wrote/ is writing) three books. She is going to start the fourth one soon. 5. I think I (meet/ met/ have met/ has met) him before. 6. Oh, yes! Now I remember. I (met/ meet/ have met/ am meeting) him when I was in Hoi An. He was our guide. 7. He ate a lot of fried food, so he (get/ got/ gets/ will get) fat quickly. 8. Lan (learns/ learn/ have learnt/ learned) English for more than a year but she can speak it very well. 9. Go Green (to encourage/ encourage/ encouraged/ has encouraged) people to recycle rubbish, such as glass, cans and paper. 10. Be a Buddy has (given/ spent/ provided/ helped) education for street children. 11. He (has collected/ collects/ is collecting/ collected) books for poor children for years. 12. I was so tired that I (got/ fell/ went/ felt) asleep in the chair. 13. When did you (recently/ already/ last/ lately) see him? 14. What did you do last night? – I watched TV, practised the violin, and (do/ did/ done/ doing) my homework 15. Would you like to go to the pop concert? – Thanks, but I (saw/ was seeing/ have seen/ have been seen) it already