1/5 A: Unit 1-Unit 4 B: Unit 5-Unit 8 2/5 A: Unit 9-Unit 12 B: Unit 13-Unit 16 3/5 A: Unit 17-Unit 20 B: Unit 21-Unit 24 4/5 A: New Words and Expressions: Unit 1-Unit 14 B: New Words and Expressions: Unit 15-Unit 24 5/5 A: Repetition Drill: Unit 1-Unit 12 B: Repetition Drill: Unit 13-Unit 24