CONTENTS 1
Unit 11 Scientific Achievements 1
Unit 12 Fact and Fantasy 15
Unit 13 The Water Planet 28
Unit 14 Freedom Fighter 45
Unit 15 Destinations 61
Unit 16 The United States of America 75
Unit 17 Disabilities 90
Unit 18 Inventions 103
Unit 19 The Merchant of Venice 118
Unit 20 Archaeology 132
参考答案 147