Chica is feminine... reservada is feminine... so which of your options are feminine? Ella and la. Ella means she so it can't work, as that would mean she girl is very reserved. La is the femenine the. So that is your answer.
Answer:
1. Yo ire a leer
2. Todos ustedes iran a prestar atención
3. Ellos van a necesitar una calculadora
4. Rosa ira a ver la tele
5. El ira a sacar apuntes
6. Yo ire a sacar buenas notas en mis examenes
7. Nosotros iremos a escuchar la maestra
8. Ellos iran a llevar un uniforme a la escuela
pls, give me brainlest <3