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 th...

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.