Answer:
1. That play was more difficult to understand than the others.
2. August is the warmest month of the year.
3. Karen’s gift was the most thoughtful of all.
4. This river is muddier than the Mississippi.
5. My brother’s hair is curlier than mine.
6. That test was the most difficult of all.
7. Yesterday’s game was more exciting than last week’s.
8. This book is easier to read than that one.
Hope this helps <3