1) what did they invent? a) b) c) 2) what did they invent? a) b) c) 3) what did they invent? a) b) c) 4) why they invented it? a) b) c) 5) why they invented it? a) b) c) 6) why they invented it? a) b) c)

technological objects

Leaderboard

Visual style

Options

Switch template

Continue editing: ?