1. The door is opened by you. 2. Questions were asked by us. 3.His project will be finished next week. 4. This exercise can be done. 5. I was invited by them to their conference. 6. A new film was seen by me. 7. Letters are written by my sister regularly. 8. New methods of students' training are developed by universities. 9. A still higher degree might be got by students after graduating from the University. 10. The curricula of technological universities must be improved by the study of foreign languages, history and economics.
