Изменить активный залог на пассивный ! , 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.

1. We were given investment advice by Banks yesterday.
2. An audit of oil refining company in this region was conducted by the accounting office.
3. A variety of software is sold to many customers all over the world by us.