Unit 1 3
Section A 3
Active Words 3
Exercises 3
Keys and Explanations 5
Section B 12
Active Words 12
Exercises 12
Keys and Explanations 15
Unit 2 24
Section A 24
Active Words 24
Exercises 24
Keys and Explanations 25
Section B 27
Active Words 27
Exercises 28
Keys and Explanations 30
Unit 3 37
Section A 37
Active Words 37
Exercises 37
Keys and Explanations 39
Section B 45
Active Words 45
Exercises 45
Keys and Explanations 46
Unit 4 50
Section A 50
Active Words 50
Exercises 50
Keys and Explanations 51
Section B 55
Active Words 55
Exercises 56
Keys and Explanations 57
Unit 5 61
Section A 61
Active Words 61
Exercises 61
Keys and Explanations 61
Section B 62
Active Words 62
Exercises 62
Keys and Explanations 65
Unit 6 71
Section A 71
Active Words 71
Exercises 71
Keys and Explanations 72
Section B 78
Active Words 78
Exercises 78
Keys and Explanations 79
Unit 7 84
Section A 84
Active Words 84
Exercises 84
Keys and Explanations 85
Section B 87
Active Words 87
Exercises 87
Keys and Explanations 88
Unit 8 92
Section A 92
Active Words 92
Exercises 92
Keys and Explanations 93
Section B 95
Active Words 95
Exercises 96
Keys and Explanations 97
Unit 9 102
Section A 102
Active Words 102
Exercises 102
Keys and Explanations 103
Section B 105
Active Words 105
Exercises 106
Keys and Explanations 107
Unit 10 111
Section A 111
Active Words 111
Exercises 111
Keys and Explanations 111
Section B 112
Active Words 112
Exercises 112
Keys and Explanations 113