He had written a poem.
A poem has written by him.
A poem had written by him.
A poem had been written by him.
A poem has been written by him.
Answer with explanationAnswer: Option C
Note :- Rule to make active voice of Past Perfect Tense :
Passive subject + had + been + third form of verb + by + passive object
The Romans expected to conquer Carthage.
The Romans expected, to have conquered Carthage.
Carthage was expected to be conquered by the Romans.
The Romans were expected to conquer Carthage.
It was expected by the Romans that they would conquered Carthage.
AnswerAnswer: Option D