Превратить предложения в предложения со страдательным залогом

1. They were invited to the party (by us).

2. The entire cake was eaten by the students.

3. The email will be sent by Maria tomorrow.

4. All options have been researched by the scientists.

5. All possible leads are being investigated (by us).

6. Spanish is spoken in the restaurant.

7. Fresh bread is baked by my mother every day.

8. The tree was knocked down by the storm.

9. The manager was criticized for his incompetence by Mel.

10. The house was being building by him when the typhoon hit.