Step-by-step explanation:
Certainly, here are the corrected sentences:
1. Our village is smaller than yours.
2. She is more intelligent than she had ever been before.
3. Mount Everest is the highest mountain in the world.
4. It is the most complete collection. I think he has gone from worse to worst.
5. He is the hardest working boy in the class.
6. Health is more preferable than wealth.
7. Ravita is taller than her sister.
8. June is the hottest of all months.
9. He is the tallest boy in his family.
10. This book is better than any other available book.
11. Today is hotter than yesterday.