Voice
The packet has not been opened by anyone.

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

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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. Who is creating this mess?

By whom this mess is being created?
Who has been created this mess?
By whom has this mess been created?
By whom is this mess being created?

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Voice
Das has posted the letter.

The letter was posted by Das.
The letter has been posted by Das.
The letter have been posted by Das.
The letter had been posted by Das.

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