Question

They will play music(active passive)
am i disturbing you?(passive)
who makes these design?(passive)
somebody is knocking at the door. (passive)
Change in active or passive voice :-

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Answer 1

Answer:

Music will be played by themselves

Are you disturbed by me

By whom these designs were made

the door is knocked by someone

Answer 2

Answer:

1. Music will be played by them.
2. Are u being disturbed by me?
3. By Whom are these designs are made?
4. The door is being knocked by someone.