Réponse:
21. Our journey took longer than we expected.
22. Charles is the noisiest student in the school.
23. Madrid's population is larger than Santander's.
24. Nothing makes me angrier than waiting on the phone.
25. Five years ago, I was fatter than I am now, and I had longer hair.
26. This car uses more petrol. It's less economical.
27. - Spanish is less difficult to learn than Chinese.
28. It's the most expensive hotel in Santander.
29. How much further are we going?
30. I haven't got many CDs. You've got many more than I have.
31. Everyone has heard about Real Madrid. They are probably the most famous team in the world.
32. The cheetah is the fastest animal in the world.
33. Barcelona's stadium is new. It's the most modern stadium in Europe.