Complete the sentences

1. Your bag is [the biggest|bigger|more bigger] than Sophie's.
2. This book is the [most interesting|more interesting|interestingest] of all.
3. My sister's room is large, but my room is [larger|largest|more large].
4. Roses are the [more beautiful|the beautifulest|most beautiful] flowers in our garden.
5. Our cat is the [nicer|more nice|nicest] pet of all.