Поставить предложения active в предложения passive voice :
1. An explorer has found a dinosaur egg.
2. Someone left the front door open.
3. Someone is using the computer.
4. His brother taught him to drive.
5. The doctor had already told him to go on a diet.

1. A dinosaur egg has been found by an explorer.

 2. The front door was left open by someone.

 3. The computer is being used by someone.

 4. He was taught to drive by his brother.

 5. He had been already told to go on a diet by the doctor.