Он, должно быть, перепутал ключи и

Он, должно быть, перепутал ключи и взял ключ соседа вместо своего. 8. После всего, что произошло, мы не могли верить ни одному ее слову.

Результаты (английский) 1:

He must have mixed up the keys and took the key instead of its neighbor. 8. After all that happened, we could not believe it either way.

Результаты (английский) 2:

He must have mixed up the keys and took the key instead of his neighbor. 8. After all that has happened, we could not believe a word of it.

Результаты (английский) 3:

He must be confused keys and took the key neighbor instead of its own. 8. After all that has happened, we could not believe no one its word.