Помогите по британскому Choose the right form of the word1. My

Помогите по британскому Choose the right form of the word
1. My friend comes to school... than I
A) early b) earlier c) the earliest
2. Kate is... girl in our class.She is going to England next moonth.
A) happier B) the happiest c) happy
3. Moscow is... city in Russia
A) big b) bigger c) the biggest
4) My sofa is.... than yours
A) comfortable b) comfortabler c) More comfortable
5. The books about Harry Porter are... among all these books
a) interesting b) more interesting c) the most interesting
6. Her composition is... than mine.
A) little b) loss c) the least