Помогите, очень прошу!!!

1. The contract has been already signed by them.
2. The new equipment has been bought by the plant.
3. The proposal was taken by the sales manager last month.
4. All the problems had been settled by us by the end of the last week.
5. Her report for the conference is being prepared by her.
6. All the data in their work will be analysed by them.
7. The mail is always brought by the secretary.
8. The guide was asked a lot of questions about the history of London by the tourists.
9. This dress has been bought at the supermarket by me.
10. A composition was being written by her the while lesson.
11. English is spoken by the people in many countries.
12. The catalogue is being looked through by them now.
13. The final version will have been made by us by the end of the year.
14. A difficult problem was solved by him yesterday.
15. This wonderful pie has just been cooked by her.