Select the option that expresses the given sentence in passive voice.
The postman had delayed the letter.
The postman had been delayed by the letter.
The postman had been delayed by the letter.
The letter was delayed by the postman.
The letter was delayed by the postman.
The letter had been delayed by the postman.
The letter had been delayed by the postman.
The letter had delayed the postman.
The letter had delayed the postman.
Correct Answer:
The letter had been delayed by the postman.