The passive voice is only used if you don't know who performed the action descried in the sentence.
What is... Incorrect.
"Timothy has hugged Jane." This is written in active voice.
What is... True.
!!!DAILY DOUBLE!!!
What is... 70%.
The painting was sold to someone.
What is.. Passive.
The famous artist was painting the mural when I arrived.
What is... The mural was being painted by the famous artist when I arrived.
The repairs are going to be done on the playground.
What is.. They are going to do the repairs on the playground.
!!!DAILY DOUBLE!!!
What is... 82 years.
Chef Nick had been preparing the restaurant's fantastic dinners for two years before he moved to Paris.
What is...The restaurant's fantastic dinners had been being prepared by Chef Nick for two years before he moved to Paris.
The customer was being helped by the salesman when the thief came into the store.
What is...The salesman was helping the customer when the thief came into the store.
"The old man was murdered." Can be put into active voice form.
What is... Correct. Someone murdered the old man.