2. Thomas Edison invented the photograph.- The photograph was invented by Thomas Edison.
3. Doctor Brown will give you some advice.- You will be given some advice by Doctor Brown. / Some advice will be given to you by Doctor Brown.
4. The gardener has planted some trees.- Some trees have been planted by the gardener.
5. Fleming discovered penicillin.- Penicilin was discovered by Fleming.
6. Someone had broken our door down.- Our door had been broken by someone.
7. Mr. Street will teach our class.- Our class will be taught by Mr. Street.
8. A college student buys books every day.- Books are bought by a college student.
9. The police search for the stolen cars.- The stolen car is searched by the police.
10. Yesterday Johnny broke the window. - The window was broken by Johnny yesterday.