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 weren't 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 hold before May Day

5. They have to repair the engine of the car. ->The engine of the car has to repaired 

6. The boys broke the window and took away some pictures. ->The window was broken and some pictures were taken away by the boys

7. People spend a lot of money on advertising everyday. ->A lot of money is spent on advertising everyday

8. They may use this room for the classroom. ->This room may be used for the classroom

9. The teacher is going to tell a story. ->A story is going to be told by the teacher

10.Mary is cutting the cake with a sharp knife. ->The cake is being cut with a sharp knife by Mary

11.The children looked at the women with a red hat.

The women with a red hat were looked by the children

12.They have provided the victims with food and clothing.

The victims with food and clothing have been provided

13.The teacher explains the lessson

The lessson is exlained by the teacher

15.The doctor examined the patients. ->The patients were examined by the doctor

16. These boys made that noise -> That noise is made by these boys

17 People speak English all over the world. ->E is spoken all over the world

18.He gave him back the money last Sunday. ->His back was given the money last Sunday

19.I can't do these exercises quickly. ->These exercises can't be done quickly

20.She had finished the report by noon.

The report had been finished by noon.

21.Should they help Jane with the sewing ? ->Should Jane be helped with the sewing?

22.The mechanic is repairing Judy's car. ->Judy's car is being repaired by the mechanic

23. We must do something before it's too late. ->Something must be done before it's too late.

24.They make these artificial flowers of silk. ->These artificial flowers are made of silk.

25.Did they feed LuLu last night? ->Were Lulu fed last night?

26.Nick will bring the pizzas to our house. ->The pizzas will be brought to our house by Nick

27.They used to drink beer for breakfast in England years ago. ->Beer was used to drunk for breakfast in England years ago

28. They were cleaning the floor when I arrived. ->The floor was being cleaned when I arrived

29.Has anyone ever asked you for your opinion ? Has you ever been asked for your opinion ?

30 Where will your company send you next year ? Where will you be sent by your company next year?