State the type of voice in the sentences. (Определи тип залога в следующих предложениях.)
1. This house was built by my uncle.
Active voice
Passive voice
2. Marmalade is made from oranges.
Active voice
Passive voice
3. The boxes have been brought by the postman.
Active voice
Passive voice
4. The song was written by a famous song-writer.
Active voice
Passive voice