Practical Exercises 1
Unit 1 1
Unit 2 9
Unit 3 17
Unit 4 27
Unit 5 35
Unit 6 45
Unit 7 55
Unit 8 63
Unit 9 72
Unit 10 80
Unit 11 87
Unit 12 96
Unit 13 108
Unit 14 116
Unit 15 125
Unit 16 136
Unit 17 145
Unit 18 155
Unit 19 162
Unit 20 169
Scripts 180
Unit 1 180
Unit 2 184
Unit 3 188
Unit 4 194
Unit 5 198
Unit 6 203
Unit 7 207
Unit 8 212
Unit 9 217
Unit 10 221
Unit 11 225
Unit 12 230
Unit 13 236
Unit 14 241
Unit 15 246
Unit 16 251
Unit 17 256
Unit 18 262
Unit 19 267
Unit 20 272