Going to the island is more dangerous. Going to the island ______(safe) ___ going to the mountain. (X - as....as)
Going to the island isn't as safe as going to the mountain.
Ferries are cheaper. Ferries _______ (expensive) _____ planes.
Ferries aren't as expensive as planes.
The train is noisy. Yes, but the train ______(noisy) _____ the plane.
isn't as noisy as