Change these sentences into Passive voice

 A. Change these sentences into Passive voice
 1. He can use milk for making butter and cheese. 
 2. She should make progress in the world of science. 
 3. The author will write this novel in June. 
 4. Nobody will solve this hard problem. 
 5. Her mother will take her to hospital next week. 
 6. Someone will clean the room.  
 7. They had to cut down that tree.  
 8. Someone should tell Sally what happened. 
 9. They’re going to build a new hospital. 
 10. We can solve the problem.  
11.Someone has to finish the job.  
12.They may send the man to prison. 
13.We must do something now.