Помогите пожалуйста.

1.This is the … book in the library.

а)most interesting

b)more interesting

2.Is she … than her sister?

a)friendlier

b)friendlyer

3.Her brother is … than her.

a)taller

b)tall

4.Some people think he’s … footballer in the world.

a)the better

b)the best

5.He’s the … person I know.

a)less generous

b)least generous