It's a game based on curiosities. The students, divided into groups are supposed to guess the right answer. They should always give a complete answer in order to practice the new grammar. Beside the answers you'll find extra information and the correct alternative is in green, so I recommend you use this worksheet as a reference and do not hand it to students as it'll be rendered irrelevant. As for the score system, you may create your own, but I give 10 points to the group that selects the right answer alone and in case more groups select the right option, I give 5 points each. Have fun!