Passive - Guessing Game

It is a game to practice passive structures. Cut out the cards and distribute them among your students. They need to create a sentence using the words given (in passive) to give some kind of hint to his peers; for example: printing was invented by him. The rest of the ss need to guess what/who it is. The right answers are given in brackets. If a s gets the correct answers, s/he gets 1 point.