8. Present Perfect: 1. They (know) each other since childhood, so their bond is very strong. 2. I (already apologize) to him three times for being late yesterday. 3. She (lose) contact with her old classmates after moving to another city. 4. We (buy) tickets to visit our grandparents in Sochi next month. 5. He (break) his promise not to argue with his brother again.

Перевод задания: Раскройте скобки, используя Present Perfect.

1. They have known each other since childhood, so their bond is very strong.
   Они знают друг друга с детства, поэтому их связь очень крепкая.
2. I apologized to him three times for being late yesterday.
   Вчера я трижды извинился перед ним за опоздание.
3. She has lost contact with her old classmates after moving to another city.
   После переезда в другой город она потеряла связь со своими бывшими одноклассниками.
4. We have bought tickets to visit our grandparents in Sochi next month.
   Мы купили билеты, чтобы в следующем месяце навестить бабушку и дедушку в Сочи.
5. He has broken his promise not to argue with his brother again.
   Он нарушил обещание больше не ссориться с братом.

В предложении 2 слово yesterday обозначает завершенное время в прошлом, поэтому требуется Past Simple — apologized, а не Present Perfect.