Voice
They have published all the details of the invention.

All the inventions have been detailed by them.
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.

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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. They have built a perfect dam across the river.

A perfect dam should have been built by them.
A perfect dam has been built by them across the river.
Across the river a perfect dam was built.
Across the river was a perfect dam.

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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. Dogs always chase cats.

Cats are being always chased by dogs.
Cats are always chasing dogs.
Cats are always chased by dogs.
Cats have been always chased by dogs.

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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. Do they sell construction material?

Does construction material sell by them?
Does construction material sold by them?
Is construction material selling by them?
Is construction material sold by them?

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