11. The owner of that house ………………………. abroad. (just go) 12. It was the third time I …………………… late for school last week. (arrive) 13. Paper ………………… in China many years ago. (make) 14. The robber ………………… away by the time the police ……………… (run / come) 15. The floor is ………………… every day. (clean) 16. While they …………………. soundly last night, a stranger entered. (sleep) 17. Many doctors believe treatments for many forms of career ………………… soon. (discover) 18. Nam rarely walks to school, but today he ………………… to school. (walk) 19. Anyone who …………………. the work yet won’t ……………… to leave now. (not finish / allow) 20. The bridge over the river ……………………… at the moment. (paint) 21. What a shame! I’d rather you (not/dismiss)………………………………. like that. 22. When I noticed the blank stare he (give)…………………… me, I (realize) …………… that he didn’t understand me. 23. Would you be so kind as (switch off)……………………………. the lights when leaving? 24. It’s imperative that the wildlife program (broadcast)……………………………………… 25. The President (deliver)………….... a speech, but in the end he (change)……………..his mind. 26. I’m sorry I wasn’t in when you came round. I would like (see)…………………………… you. 27. I can’t understand why he (be)…………………………… so selfish. He isn’t usually like that. 28. Just inside the outer later of the earth's atmosphere (be)...........................the elements necessary to protect it from ultraviolet rays, extreme temperatures, and threatening foreign substances. 29. I hope you don’t mind my mentioning this but some rumors (circulate) ……………………… about your engagement to banker. 30. I didn’t see anyone but I (watch)……………………………….……… 31. He has worked hard all the week, but today he (have)……………………. a good time at home. 32. There (be)…………………………………... a lot of changes since computers were invented 33. Nam (watch)………….................. TV while his friends were making cakes yesterday morning. 34. If we (not protect)………………………… the environment, our planet will be badly polluted. 35. When I came to school, everybody (be)…………………………………………….. there. 36. She gets used to (take)………………………………………….. to the zoo on weekends