1. Corn was grown by people in Lowa.

2. That novel was written by J.K. Rowling.

3. The flat tire was changed by Rudi.

4. The meal are going to be prepared by them.

5. Ann will be invited to the party by Billy.

6. The farmer's wagon were pulled by two horses.

7. The novel was read in one day by mom.

8. The house will be cleaned every Saturday by me.

9. A safety video is required to be watched by staff every year by the company.

10. The student's questions are always answered by the teacher.