изменение глагола от пассивной к активной форме.
1) the work has already been completed
2) the cake was made by mrs.Adams
3) this room is cleaned every day
4) it was taken by him
5) this article was translated ( by us) at the lesson
6) the breakfast is bought by the waiter

1. They already completed the work2. Mrs.Adams made the cake3. They clean this room every day4. He took it5. We translated this article at the lesson6. The waiter (has) bought the breakfast 

1 I have already completed the work.2 Mrs.Adams made the cake.3 She cleans this room every day.4 He took it.5 We translated this article at the lesson.6 The waiter buys breakfast.