1. The police didn't ask questions about the thief.
=>Questions about the thief weren't asked by the police.
2. Does the committee appoint Alice as secretary for the meeting?
=> Is Alice appointed as secretary for the meeting by the committee?
3. She isn't going to write a poem.
=> A poem is not going to be writen.
4. We mustn't finish the test before ten.
=> The test must not be finished before ten.
5. Tom hasn’t finished the exercises.
=> The exercises have not been finished by Tom.
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