Unit 4: Lesson 4: C1-2/ p.49
Unit 3: Lesson 4: B3-5/ p.37
Unit 6: Lesson 4: B4/ p. 67
Unit 8: Lesson 4: B1-2/ p.86-87
Unit 9: Lesson 4: B2-3/ p.101- 102
Unit 10: Lesson 4: B1-3/ p.108-109
Unit 11: Lesson 4: B1,3,4/ p.119- 120
Unit 12: Lesson 4: B4-5/ p.128- 129