Here’s a suggested way to fill in the blanks for "The Importance of Friendship":

1. **vital** - Friendship is a **vital** part of a teenager's life.
2. **support** - Friends provide **support** and companionship during a time of many changes.
3. **free** - Many teenagers enjoy spending time with friends at school and in their **free** time.
4. **together** - They might hang out at the park, play video games, or go to the movies **together**.
5. **difficult** - Good friends help each other through **difficult** situations.
6. **stressed** - When a teenager is feeling down or **stressed**, a supportive friend can make a big difference.

Feel free to adjust the choices based on the context!