1. You mustn't make any noise
2. You must be quite.
3. You mustn't eat or drink.
4. You must be careful with the books.
5. You mustn't leave books on the table when you leave.
6. You must put the books back in the right place.
ex. 7
1. the best
2. the fastest
3. bigger
4. more difficult
5. the most expensive
6. the youngest
7. heavier
8. the most careless
9. more
10. worse