帮忙变下被动语态!1.We clean the classroom 2.People do not know Mark

1.The classroom is cleaned by us.
2.Mark Twain isn't known as a great thinker.
3.It is thought as one of the greatest books in American literature today.
4.The kite was made when he was a little boy.
5.I wasn't chosen this time.
6.The trees will be planted by them tomorrow.
7.I won't be allowed to watch their fans.
8.The work has been finished by Jim.
9.Paper and printing have been used for ages.
10.Information can be kept on CD-ROMS.
11.IS rice grown by farmers in spring?
12.Were you defeated by Tom last time?
13.We will be asked to play in the Olympic Games.
14.When will the match be held?
15.Has the book been published yet?
16.How can the work be finished in such a short time?
保证正确率~

1.We clean the classroom
The classroom is cleaned by us.
2.People do not know Mark Twain as a great thinker.
Mark Twain is not known as a great thinker.
3.Today people think it is one...