Complete: The London Eye is the ____________ (tall) observation wheels in the world.
tallest
Complete: London is ___________ (expensive) than Rome.
more expensive
Complete: __________ (good) way to get around London is by taking the bus.
The best
Complete: Taking the tube is __________ (cheap) than taking a taxi in London.
cheaper
Complete: London is _________ (cold) than São Paulo.
colder
