They repaired the machine. Change into passive voice.
AThe machine has been repaired by them.
BThe machine was repaired by them.
CThe machine is repaired by them.
DThe machine has repaired by them.
AThe machine has been repaired by them.
BThe machine was repaired by them.
CThe machine is repaired by them.
DThe machine has repaired by them.
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Turn into the Passive :
She knows the musician personally