Réponse :

exo2

1/   these are the highest buildings I've ever seen

2/  this is the best rock and roll group in the world

3/  this is the oldest castle in the region

4/   this is the busiest street in london

5/   this is the worst film I've ever seen

exo3

1/   these exercices are more difficult and more difficult

2/   he understands english better and better

3/   she plays the piano worse and worse

4/   nowadays streets are noiser and noiser

5/   planes fly higher and higher

Explications :