Упр.10 Юнит 5 Урок 56 ГДЗ Happy English Кауфман 8 класс

Find the sentences in the passive. Why was the Passive used in those sentences?

1. The Passive is used when the action is more important than the doer.
2. The Passive is used when we do not know who did the action.
3. The Passive is used when it is not important who did the action.