Rewrite these sentences in the passive voice. 1. the students could do that work without their teacher’s assistance. 2. they cannot complete this project in a week. 3. can you inform me as soon as possible? 4. we send you some e-mails during a day. 5. you couldn’t give me back the book timely, could you? 6. this work must be done in time. 7. you may not come here! 8. he might be present at the lecture, mightn’t he? 9. he had to finish the job. 10. the teacher gives good marks to his students, doesn’t he?

"Nature provides free lunch, only if we control our appetites." This is a powerful sentence. Nature cannot provide for a community that is taking faster than it can produce. Example, a mother with nine children cannot make them all lunch at once. Some will be served before others, and they will have to be patient. If all the children want seconds, the mother will be tired and may not be able to provide the second meal. Statistics from Webecoist state that, "Oxygen-starved dead zones that cannot sustain life now cover an area approximately the size of Oregon. Dead zones are caused by excess nitrogen from farm fertilizers, factory and vehicle emissions, sewage and other pollution runoff." Humans causing these large, and increasing, dead zones will cause an extreme depletion in sea life. These animals are dying due to human error. 

1.the flowers must be watered.
2. the dinner is being prepared.
3. the letter was delivered yesterday by the postman.
4.  the football match may be cancelled.
5.will the living room be painted tommorow.
6.australia was directed by baz luhrmann.
7. his book will be translated into chinese.
8. the camera's can not be used inside the gallery.
9.have the invitations been sent?
10. the kids were droven to school by mr.roberts.
11. their room has been tidied by 7 o'clock.
12. the window was left open.
13. the email ought to be sent now.
14.the mirror was not broken by tim.