Practicing Success
Practicing Success
CUET Preparation Today
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. |
Dr. John Gibbon was developing a machine in the US after twenty years. Dr. John Gibbon developed a machine in the US after twenty years. Dr. John Gibbon has developed a machine in the US after twenty years. Dr. John Gibbon had developed a machine in the US after twenty years. |
Dr. John Gibbon had developed a machine in the US after twenty years. |
