Unit 1 That must be a record! 1
Unit 2 Crossing limits 13
Unit 3 The land down under 24
Unit 4 Green world 35
Unit 5 Getting the message 49
Unit 6 Going West 63
Unit 7 A Christmas Carol 77
Unit 8 Learning a foreign language 89
Unit 9 Health care 100
Unit 10 American literature 112
Unit 11 Key to success 126
Unit 12 Education 138
Unit 13 The mystery of the Moonstone 149
Unit 14 Zoology 161
Unit 15 Popular youth culture 177
Unit 16 Finding jobs 192
参考答案 205