Change the active voice of the verbs in the following sentences into a passive voice.
1. Mary sings a song.
2. The man buys some flowers.
3. Mrs. Rivera brings some food.
4. Hector makes an announcement.
5. We watch the concert.
Change the passive voice of the verbs in the following sentences into an active voice.
1. The windows are cleaned by Alyssa.
2. The big bear is killed by a hunter.
3. The chicken is cooked by my mother.
4. Spoliarium was painted by Juan Luna.
5. Our breakfast was prepared by a renowned chef.​