目錄:Table of Contents
Unit01 Who is the best? ? 4
Unit02 What’s the world’s best? ? 12
Unit03 We use water every day. ? 20
Unit04 We can save many things. ? 28
Unit05 Do you like bears? ? 36
Unit06 Bad weather can be dangerous. ? 44
Unit07 We eat plants and animals. ? 52
Unit08 Be safe outdoors. ? 60
Unit09 What’s in the house? ? 68
Unit10 How many crayons are there? ? 76
Word List ? 84
Workbook ? 93
Answers and Scripts ? 126