Answer:
- Ellos estaban en la escuela. (They were at the school.)
Step-by-step explanation:
YO estaba
TU estabas
EL - ELLA estaba
NOSOTROS estábamos
VOSOTROS estabais
ELLOS - ELLAS estaban
We use to ESTAR when a person is in a certain situation or condition. Also when it means that a certain period of time remains in a place or in a certain situation or to indicate the mood that we experience or that someone manifests, among others .