Unit 11 Scientific Achievements 1
Unit 12 Fact and Fantasy 17
Unit 13 The Water Planet 33
Unit 14 Freedom Fighters 49
Unit 15 Destinations 65
Unit 16 The United States of America 81
Unit 17 Disabilities 97
Unit 18 Inventions 112
Unit 19 The Merchant of Venice 127
Unit 20 Archaeology 142
期中测试题 157
期末测试题 163
参考答案 169