Réponse :
1) b) It is longer than the Amazon.
2) b) It is bigger than Australia.
3) a) The Sears Tower [...] is the tallest building in the world.
b) It is taller than the World Trade Center [...]
4) a) Lake Superior in Canada is the biggest lake in the world.
b) It's bigger than Ireland.
5) a) The Pacific Ocean is the biggest ocean in the world.
b) It is bigger than the Indian Ocean.
Explications :
Bonsoir :]