Составить вопросы, используя пассив 1) ask about the telephone (when/invent) 2) ask about glass (how/make) 3) ask about australia (when/discover) 4) ask about silver (what/use for) 5) ask about television (when/invent)

1) When was the telephone invented?
2) When was glass made?
3) When was Australia discovered?
4) What was silver used for?
5) When was television invented?