1.

Our teacher wants our lessons to be prepared carefully.

2. 

They expected my work to be finished early.

3.

Are big cakes being made by her for the party?

4.

The house needs to be cleaned.

5. 

River water couldn't be preserved in the past.

6. 

I was made to stay outside yesterday.

7. 

We were allowed to go home early by the teacher last week.

8. 

He had the luggage carried home by the waiter.

9. 

I got the letters posted by the postman.

10. 

The lights should be turned on!

11. 

English is known to be an international language.

12. 

Don't let that silly thing happen/ occur again.

13. 

This phone will continue to be used.

14. 

Were jeans made two hundred years ago?

15. 

The road was opened 10 years ago.