2.The train is more expensive than the ..... but it is not as expensive as the.... . 3.The ... is not as cheap as the

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