Lesson 6 Lesson 6 Revieww 4 4 Re vie 1 4.20 Listen and circle. 1 2 a a b b 3 4 a b a b 2 Draw. y. 3 4.21 Listen. Then say. Activity Book, Unit 4 Sounds and Spelling Book Lesson 6 Unit 4, Lesson 6 forty-five 45