Change the following sentences into passive voice:

1. No one told us the news.
2.Paul didn't tell me the ending of the story.
3.the teacher will give her a prize if she works well.
4.her mother bought her a doll last week.
5.the police found the robber in the forest yesterday.
6.they made him work all day.
7.people don't make the children work hard.
8.they let him meet her family last month.
9.he won't let you do that silly thing again.
10.people saw him steal your car.
11.i have heard her sing this song several times.
12.the teacher is watching them work.
13.alice had a mechanic repair her car.
14.ellen got Marvin to the her paper.
15.the hairdresser is cutting Mary's hair now.
ーMary is having her hair___________________________________.
ーMary is having he hairdresser___________________________________.
16.People know that English is an international language.
ーIt is known_____________________________________.
ーEnglish is known_____________________________________.
17.they said that she won the competition.
ー__________________________________________________.
ー__________________________________________________.
18.they reported that the President had suffered a heard attack.
ー______________________________________________________.
ー______________________________________________________.
19.they need to clean the window.
ー_______________________________________________________.
ー________________________________________________________.