Here's how you can fill in the blanks with the words from the box:

1. **challenging**
2. **Teenagers**
3. **pressure**
4. **guidance**
5. **academic**
6. **strong**
7. **important**

Final filled text:

Being a teenager can be a (1) **challenging** time in one's life. It's a period of transition from childhood to adulthood, with many physical, emotional, and social changes occurring. (2) **Teenagers** want to do with their lives, and how they fit into the world around them.

One of the biggest challenges that teenagers face is peer (3) **pressure**. They want to fit in with their friends and be accepted by their peers, and this can often lead to them making choices that may not be in their best interest. It's (4) **guidance** for teenagers to learn how to make their own decisions and stand up for themselves, even if it means going against the crowd. Teenagers are also facing the pressures of (5) **academic** performance and preparing for their future. They may be feeling the stress of trying to maintain good grades, studying for (6) **strong** and deciding what career path to take. It's important for teenagers to have a support system in place, whether it's their family, friends, or a school counselor, to help them navigate these challenges.

Overall, being a teenager is a complex and often difficult time in one's life. It's (7) **important** for teenagers to have a support system, develop healthy coping mechanisms.