Change into passive voice

:    Exercise 1: Change into passive voice.

1. The teacher corrects our exercises at home.

Asphalt legends unite                                                                        

2. Alice gave me a wonderful present.

3. They are building several new schools in our town.

4. We have made great progress in industry, science and medicine.

5. Sam killed a lion last week.

6. You must hand in your report before the end of this month.