Change the following sentences into passive voice

I. Change the following sentences into passive voice. 1. Mr Tuan delivered the speech yesterday. 2. Turn off the computer at night. 3. I clean the floor everyday. 4. My mother bought this dress this morning. 5. She did this exercise two days ago. 6. They send him abroad to study chemistry. 7. Nobody has used this room for a long time . 8. Someone has stolen my bike. 9. He has just received a letter from his parents. 10. She will buy this house. 11. They are building my house. 12. Lan was making my new dress at this time yesterday. II. Put the verbs in the brackets into the correct tense. 1. She (come) .......................................... to France 2 years ago. 2. I (just send) ................................................. the letter. 3. He (work)........................................... for that company for 5 years. 4. I (graduate).................................... from Hue University last year. 5. Tom (play )...................................... football every afternoon. 6. I (cook) ....................................... in the kitchen when he came in 7. Mai (attend) .................................... a meeting at the moment. 8. (help) ................................. him whenever he needs. 9. Mary (find) ................ a five – pound note while she (walk) .....................to school yesterday. 10. I (just finish) ..................... reading War and Peace .It's a brilliant book. 11. I (not be) ........................ at work tomorrow ,I'm taking the day off. 12. How long ............... you (be ) ........ a nurse, Mss Lan? For 5 years. 13. While Peter (drive) ....................... home late last night he (run) ...................... out off the petrol. 15. She always (get) ........................... up early to study her lessons. 16. Nylon (invent) .............. in early 1930s by an American chemist, Julian Hill. Other scientists (work) ........... with his invention and finally on 27 Octorber 1938, nylon (introduce).................. to the world .It was cheap and strong and immediately (become) ................. successful, especial in making old ladies' stockings. During the Second World War , it (use) ................. to make parachutes and tyres. Today, nylon (find) .................... in many things: carpets, ropes, seat bells, furniture, computers and event space parts for the human body. It ( play ) .................. an important part in our lives for over 50 years. Next year, about 2.6 million tons of nylon (manufacture) ............... III. Make complete sentences using the given cues. 1. you / send / letter / yet ? 2. Nile / longest / river / in / world 3. Hoa / salary / high / than / Tom/s 4. He / work / hard / order/ pass / exam 5. Early this morning / children / decide / go / a run 6. Sydney opera / complete / 1973. 7. The road / join / two villages / be / narrow. 8. It / not difficult / translate / this sentence/ English 9. You / mind / lend / me / dictionary ? 10. New bicycle /make / Japan / be / expensive. 11. you / see / film / Jurassic Park / yet ? 12. The Mekong river / long / the Red river 13. Ba / interlligent / Nam 14. Sears Tower / short/ PETRONAS Twin Towers 15. Mexico city / big / in the world 16.Ba / good / in our class.