2.The train is more expensive than the ..... but it is not as expensive as the.... .
3.The ... is not as cheap as the bus,but it is faster than the train.
4.The ... is not as expensive as the plane,but it is more comfortable than the ... .
5.The .... is the cheapest.
6.The .... is the most comfortable.
СРОЧНО!!!!!

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.