27. We ... on our way home yesterday. Choose one answer: a) were being followed; b) are being followed; c) have been followed; d) followed.

Перевод задания: За нами ... по дороге домой вчера.

Правильный вариант: a) were being followed.

Слово yesterday указывает на прошедшее время, а действие происходило в определённый момент. Используется страдательный залог в форме Past Continuous: were being followed.

We were being followed on our way home yesterday. (За нами следили по дороге домой вчера.)

Ответ: a) were being followed