From the series Red Rocket Readers Decodable Explorers.

Tyrannosaurus Rex was an enormous dinosaur that lived on Earth millions of years ago. T-Rex was probably the fiercest of all the dinosaurs. We know what the dinosaurs were like because people have found their bones. Artists have made models and pictures to show what they looked like. What do you know about T-Rex? Focus Skills: x, z, v, w, y, digraph -ng