Unit 11 Scientific achievements 1
Unit 12 Fact and fantasy 21
Unit 13 The Water planet 39
Unit 14 Freedom fighters 59
Unit 15 Destinations 82
Unit 16 The United States of America 101
Unit 17 Disabilities 129
Unit 18 Inventions 145
Unit 19 The Merchant of Venice 159
Unit 20 Archaeology 177