7.
Slow - the slowest
Fat - the fatest
Thin - the thinnest
Pretty - the prettiest
Easy - the easiest
Famous - the famoustest
8.
1. Mount Everest is the highest mountain in the world.
2. Which is the longest river in Italy?
3. Beatrice is the tallest girl in our class.
4. My schoolbag is the heaviest in the class.
5. Who is the fastest runner of all the students?
6. Which is the borest book of these three books?