Ответы
1.smart, smarter, smartest
2.far, farther, the farthest
3. bad, worse, the worst
4.fat, fatter, the fattest
5.interesting, more interesting, the most interesting
6.narrow, narrower, narrowest
7.safe, safer, the safest
8.dangerous, more dangerous, the most dangerous
9.messy, messier, the messiest
10.handsome, more handsome, the most handsome
11. attractive, more attractive, the most attractive
12.delicious, more delicious, the most delicious
13.useful, more useful, the most useful
14.easy, easier, the easiest
15.lucky, luckier, luckiest
16.quite, quieter, the quietest
17.noisy, noisier, the noisiest
18.modern, more modern, most modern
19.patient, more patient, most patient
20.convenient, more convenient, most convenient
21.accurate, more accurate, most accurate