на лестничной площадке было четыре

на лестничной площадке было четыре двери. Я не знала, которая из них была дверь моих друзей

Результаты (английский) 1:

the staircase had four doors. I didn't know which of them was the door of my friends

Результаты (английский) 2:

on the landing had four doors. I did not know which of them was the door to my friends

Результаты (английский) 3:

on the landing was a four door. i don't know which of them was the door of my friends