Unit 4, Lesson 58, Exercise 5
Unit 2, Lesson 30, Exercise 1
Unit 1, Lesson 6, Exercise 2
Unit 3, Lesson 46, Exercise 1
Unit 3, Lesson 46, Exercise 2
Unit 3, Lesson 41, Exercise 5
Unit 4, Lesson 64, Exercise 1
Unit 4, Lesson 62, Exercise 1
Unit 3, Lesson 37, Exercise 1,2
Unit 2, Lesson 23, Exercise 3
Unit 4, Lesson 53, Exercise 2
Unit 4, Lesson 64, Exercise 4
Unit 3, Lesson 40, Exercise 1
Unit 3, Lesson 35, Exercise 4
Unit 4, Lesson 55, Exercise 7
Unit 4, Lesson 54, Exercise 1
Unit 3, Lesson 34, Exercise 3
Unit 1, Lesson 5, Exercise 1
Unit 2, Lesson 28, Exercise 1
Unit 4, Lesson 59, Exercise 1
Unit 2, Lesson 21, Exercise 1
Unit 1, Lesson 1, Exercise 4
Unit 1, Lesson 1, Exercise 1
Unit 2, Lesson 25, Exercise 2
Unit 4, Lesson 57, Exercise 3
Unit 3, Lesson 42, Exercise 3
Unit 2, Lesson 27, Exercise 2
Unit 2, Lesson 29, Exercise 1
Unit 3, Lesson 45, Exercise 1
Unit 3, Lesson 36, Exercise 3
Unit 3, Lesson 42, Exercise 1
Unit 1, Lesson 3, Exercise 1
Unit 4, Lesson 58, Exercise 1
Unit 4, Lesson 56, Exercise 1
Unit 2, Lesson 24, Exercise 3
Unit 3, Lesson 39, Exercise 1
Unit 1, Lesson 1, Exercise 5
Unit 2, Lesson 26, Exercise 1
Unit 4, Lesson 55, Exercise 1
Unit 4, Lesson 57, Exercise 1
