Track 1, unit 1, page 21, exercises 3 and 4

Track 2, unit 1, page 21, exercise 5

Track 3, unit 2, page 33, exercises 4 and 5

Track 4, unit 2, page 33, exercise 6

Track 5, unit 3, page 45, exercises 3, 4 and 5

Track 6, unit 3, page 45, exercise 6

Track 7, unit 4, page 57, exercises 5 and 6

Track 8, unit 4, page 57, exercise 7

Track 9, unit 5, page 69, exercises 3 and 4

Track 10, unit 5, page 69, exercise 5

Track 11, unit 6, page 81, exercises 3, 4 and 5

Track 12, unit 6, page 81, exercise 6

Track 13, unit 7, page 93, exercises 4 and 5

Track 14, unit 7, page 93, exercise 6

Track 15, unit 8, page 105, exercises 4 and 5

Track 16, unit 8, page 105, exercise 6

Track 17, unit 9, page 117, exercises 4 and 5

Track 18, unit 9, page 117, exercise 6