Voice
The packet has not been opened by anyone.

Anyone has not opened the packet.
No one has not opened the packet.
No one has opened the packet.
No one has been opening the packet.

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Voice
Why didn't you invite him for the party?

Why didn't he invited by you for the party?
Why couldn't he be invited by you for the party?
Why was he not invited by you for the party?
Why he not invited by you for the party?

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

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Voice
Leo Tolstoy wrote 'War and Peace.'

'War and Peace' was being written by Leo Tolstoy.
'War and Peace'will be written by Leo Tolstoy.
'War and Peace' was written by Leo Tolstoy.
'War and Peace' is written by Leo Tolstoy,

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