State the type of voice in the sentences. (Определи тип залога в следующих предложениях.)

1. This chair has been made by students.

Active voice
Passive voice
2. Marmalade is made from oranges.

Active voice
Passive voice
3. They don't read these books.

Active voice
Passive voice
4. The song was written by a famous song-writer.

Active voice
Passive voice
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