| Q.59 | 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. | |
| Ans | 1. Dr. John Gibbon developed a machine in the US after twenty years. | |
| 2. Dr. John Gibbon was developing a machine in the US after twenty years. | ||
| 3. Dr. John Gibbon had developed a machine in the US after twenty years. | ||
| 4. Dr. John Gibbon has developed a machine in the US after twenty years. |
Correct Ans Provided: 3