1. She is the kindest in the world (превосходная).
2. His pride is the most interesting part of his nature (превосходная).
3. I think you are more carefully than anyone else (сравнительная).
4. I don't know worst lad than his grandson (сравнительная).
5. His cheeks are redder than anyone else's (сравнительная).
6. Now they are going at a bigger pace (сравнительная).
7. He is most serious partner i can think of (превосходная).