Select the option that expresses the given sentence in active voice.
A machine had been developed by Dr. John Gibbon in the US after twenty years.
Answer & explanation
Correct answer: option 4
A detailed explanation for this question is coming soon.
Select the option that expresses the given sentence in active voice.
A machine had been developed by Dr. John Gibbon in the US after twenty years.
Correct answer: option 4
A detailed explanation for this question is coming soon.