Answer:
La tienda estaba ocupada hoy ( The store was busy today)
La biblioteca estaba muy tranquila. ( The library was very quiet)
La piscina no estaba abierta. ( The pool wasn't open)
Acabo de comprar muebles para el patio.( I just bought furniture for the patio)
El país tenía abundancia de árboles ( The country had plenty of trees)
Step-by-step explanation:
I understand you said only three senetences but I didn't know if you wanted two sentences using la and 1 using el ( vice versa). I hope I helped if not be sure to let me know <33