Put he following nto the passive they have sold their car to pay their debt?

put he following nto the passive
1. They have sold their car to pay their debt

Their car has been sold to pay their debt
2. People have developed many different paper products

Many different paper products have been developed
3. Wastes from chemical factories have caused a lot of pollution

A lot of pollution has been caused by wastes from chemical factories
4. They have just given the children some gifts

The children have just been given some gifts
5. People have used the ballpoint pens for many years

The ballpoint pens have been used for many years
6. We haven't finished our homework yet

Our homework hasn't been finished yet
7. they haven't collected the rubish

The rubbish hasn't been collected
8. he hasn't written novels for ages

Novels haven't been written for ages
9. we haven't used these rooms for a long time

These rooms haven't been used for a long time
10. Lan hasn't visited her grandparents since last year

Lan's grandparents haven't been visited since last year
11. have terrorists attacked many cities in the world for months?

Have many cities been attacked in the world by terrorists for months?
12. Has anyone shown you the new machine?

Has the new machine been shown you?
13. Has the author written a special edition for children?

Has a special edition been written for children by the author?
14. Have thay chaned the date of the meeting?

Has the date of the meeting been changed?
15. Have the two countries established friendly relations?

Have friendly relations been established by the two countries?
16. He asked me many difficult question

I was asked many difficult question
17. She advised us to reuse milk bottles

We were advised to reuse milk bottles
18. They made the fire in the traditional way

The fire was made in the traditional way
19. He finished his exercises on time

His exercises were finished on time
20. This boy broke my window yesterday

My window was broken by this boy yesterday?
21. The lawyer gave him the details of his uncle's will

He was given the details of his uncle's will by the lawyer