Complete the sentences with words related to the stages of a person's life.
baby  child  senior  citizen  teenager  middle-aged

1. My nephew is 8. He's a...... He wants to be a firefighter.

2. My brother is 16. He's a...., He loves basketball more than anything.

3. My grandmother is 74. She's a....... She plays bridge every Tuesday with her friends.

4. My little sister's only 6 weeks old. She's a...... She cries a lot!

5. My mum is 49. She's....... She's a doctor in the local hospital.