Answer:
1. A report was written about Franklin D. Roosevelt by someone.
2. Ms. Waters assigned us our reports.
3. I chose Cesar Chavez as the subject of my report.
4. Chavez began the United Farm Workers.
Step-by-step explanation:
The subject does what the verb says in the active voice. The subject is in the passive voice when the verb does something to it. The subject is usually in front of the verb in active words. When you use passive language, the subject comes next to the verb.