Put the following into the passive voice.
1. They can’t make tea with cold water.
=) Tea can't be made with cold water
2. The chief engineer was instructing all the workers of the plant.
=) All the workers of the plant were being instructed by the chief engineer
3. Somebody has taken some of my books away.
=) Some of my books has been taken away
4. They will hold the meeting before May Day.
=) The meeting will be held before May Day
5. They have to repair the engine of the car.
=) The engine of the car has to be repaired