Write questions using the passive. Some are present and some are past.
Ask about television. (when/invent?)
When was television invented
Ask about the telephone. (when/invent?) When was the telephone invented?
Ask about glass. (how/make?) How is glass made?
Ask about Australia. (when/discover?) When was Australia discovered?
Ask about silver. (what/use for?) What is silver used for?
Ask about television. (when/invent?) When was television invented?