Part One：NorthStar Practice Units for the TOEFL？iBTUNIT 1 Media 1
UNIT 2 Overcoming Obstacles 15
UNIT 3 Medicine 33
UNIT 4 Natural Disasters 51
UNIT 5 Conservation 69
UNIT 6 Philanthropy 87
UNIT 7 Education 103
UNIT 8 Food 121
UNIT 9 Immigration 137
UNIT 10 Technology 157
Evaluation Forms for Integrated and Independent Tasks 173
Audioscript 175
Answer Key 193
Part Two：ETS Practice Sets for the TOEFL？iBTListening 206
Reading 211
Writing 220
Speaking 222
Audioscript 225
Answer Key 229
TOEFL？iBT Writing and Speaking Rubrics 231