Задание 5. Измените активный залог на пассивный и переведите предложения на русский язык.
Выполните по образцу:
This plant had fulfilled the plan by the end of month. The plan had been fulfilled by the end of month.
1. Banks gave investment advice to us yesterday.
2. The accounting office was conducting an audit of oil refining company in this region.
3. We sell a variety of software to many customers all over the world.