Когда Ольга вернулась домой, она ув

Когда Ольга вернулась домой, она увидела, что ее сестра разговаривает с человеком, которого она никогда прежде не видела.

Результаты (английский) 1:

When Olga returned home, she saw that her sister was talking to a man she had never seen before.

Результаты (английский) 2:

When She returned home, she saw that her sister is talking to the man whom she had never before seen.

Результаты (английский) 3:

When she returned home, she saw that her sister is talking to a person, which she had never before seen.