Final answer:
Sentences were successfully converted from active to passive voice, emphasizing the action rather than the doer, and ensuring the subject is acted upon, consistent with the passive voice's structure.
Step-by-step explanation:
Converting sentences from active to passive voice involves placing the object of the sentence as the subject of the sentence. Here are the given sentences rewritten in passive voice:
Mother's car cannot be repaired by the mechanic because the spare parts have not been delivered.
Wheat has been grown in this part of the country for decades by farmers.
The scandal is being reported by all the newspapers.
How was this delicious meal made by you?
The missing gin was not found by the police, so a statement was issued.
White wine should be kept at about 8°C.
All shoplifters will be reported to the police by shop security.
Judy was told by the doctors that she has six months to live.
The freshly cut lawn must not be stepped on by pupils.
English is spoken all over the world by people.
All guests are asked to check out before noon by hotel management.
The old museum was being renovated when we walked by.
Tickets for the concert can be bought here.
He was brought to the arena by helicopter.
Your new bike will be stolen if a lock is not put on it by you.