Решение:
- Lena is ... than Mary. c.funnier
- That is the ... book of all. c.worse
- Sue's doll is... than Lulu's. b.prettier
- I think dolphins are ... animals. b.clever
- Roy is the ... boy in our class. a.strongest
- He is ... than his brother. b. Kinder
- Alice is a ... girl c.cleverest
Ответ: c, c, b, b, a, b, c.