Passar as frases da voz ativa para a passiva sem mencionar o agentes:
1. They published Leite derramado in 2009.
2. They are destroying the forest.
3. They do not allow dogs in the museum.
4. They will serve dinner in a moment.
5. People must not throw garbage in the ocean.
6. Someone is watching us, don't you think?
7. People can see microbes under a microscope.