Voice
One of the girls in the class will sing the national anthem at the end of the function.

The function will end, a girl will sing national anthem at the end of the function.
A girl to sing national anthem is there in the class.
The national anthem will be sung by one of the girls in the class at the end of the function.
There is a girl in the class who sings national anthem.

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Voice
In the following question, a sentence has been given in Active/Passive Voice. Out of the four/five alternatives suggested, select the one which best expresses the same sentence in Passive/Active Voice. Has anybody answered your question?

Your question has been answered?
Has your question been answered?
Anybody has answered your question?
Have you answered your question?

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Voice
They have published all the details of the invention.

All the details of the invention have been published by them.
The publication of the details of invention was done by them.
All the details have been invented by the publishers.
All the inventions have been detailed by them.

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