Relier Pairs InventionsVersion en ligne Based on the unit 7 Good Idea! of the book Our world 4! par Claudia Casanova 1 Try 2 Fail 3 A solution 4 Invention 5 Invent 6 A Wheel 7 A problem 8 Idea 9 Imagination 10 Battery 11 Useful 12 Succed 13 Electricity 14 Creativity