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.
2.The train is more expensive than the tram but it is not as expensive as the bus. Поезд дороже чем трамвай, но не такой дорогой, как автобус. 3.The plane is not as cheap as the bus,but it is faster than the train. Самолет не такой дешевый, как автобус, но быстрее, чем поезд.4.The taxi (car) is not as expensive as the plane,but it is more comfortable than the train . Такси (машина) не такое дорогое, как самолет, но удобнее, чем поезд. 5.The tram is the cheapest. Трамвай самый дешевый. 6.The plane is the most comfortable. Самолет самый удобный. P.S. Личное мнение.
P.S. Личное мнение.