Напишите 7 предложений в Past Perfect Passive

1. All arrangements had been made before the performance began.
2. The dinner had already been cooked by the time the guests arrived.
3. He said that he had been given a very complicated task a previous lesson.
4. By five oclock yesterday all the lessons had already been done by me.
5. A lot of information had been studied before she wrote her report.
6. When parents came home the house had already been perfectly cleaned by their children.
7. We were told that the contract had already been signed the day before.