Contents 1
Unit 1 Growing Up 1
Unit 2 Friendship 17
Unit 3 Understanding Science 34
Unit 4 American Dream 51
Test One（Units 1-4） 68
Unit 5 Romance 79
Unit 6 Animal Intelligence 96
Unit 7 Emergency 112
Unit 8 Coping with an Educational Problem 129
Test Two（Units 5-8） 146
Key to Exercises 157
Tape Scripts 181