1.
They make shoes in that factory.
1. Shoes are made in that factory
2.People must not leave bicycles in the driveway.
2. Bicycles cannot be left by people
3.They built that skyscraper in 1934.
3. That skyscraper was built in 1934
4.The students will finish the course by July.
4. The course will be finished by the students.
5.They are repairing the streets this month.
5. The streets are being repaired this month.
6.They make these tools of plastic.
6. The tools are made of plastic.
7.They have finished the new product design.
7. The new product design was finished.
8.They were cooking dinner when I arrived.
8. Dinner was being coocked.
9.Smithers painted 'Red Sunset' in 1986.
9. Red Sunset was painted by Smthers
10.Did the plan interest you?
10. The plan did interest you?
11.They had finished the preparations by the time the guests arrived.
11. By the time the guests arrived, the preparations had been finished
12.You should take care when working on electrical equipment.
12. Working on electrical equipmant.... ?
13.They are going to perform Beethoven's Fifth Symphony next weekend.
13. B.F.S is going to be performed.
14.Someone will speak Japanese at the meeting.
14. Japanese will be spoken at the meeting.
15.Karen is going to prepare the refreshments.
15. The refreshments is going to be prepared by Karen.
Something like this?