a)1. B 2. B 3. D 4. A 5. D
d)2.good-better-the best
3.young-younger-the youngest
4.pretty-prettier-the prettiest
5.cheap-cheaper-the cheapest
7.expensive-more expensive-the most expensive
8.interesting-more interesting-the most interesting
9.delicious-more delicious-the most delicious
10.beatiful-more beatiful-the most beatiful