Express the same using passive-1

1.The contents of the novel MUST BE DISCUSSED.2.The audience OUGHT TO BE IMPRESSED BY THE ACTORS.3.These chatterboxes SHOULD BE STOPPED BY YOU.-1.A lot of words WERE BORROWED in ENGLISH.2.A lot of periodicals ARE BROUGHT TO THEM BY THE POSTMAN .3. This telex WILL BE SENT BY Mr Wiliam`s secretary tomorrow.