Contents 1
Unit 1 Efficient study 1
Unit 2 Public holidays 41
Unit 3 Another view of America 79
Unit 4 Rising sea levels 117
Unit 5 War of the worlds! 157
Unit 6 The world of computers 197
Unit 7 Happiness 235
Unit 8 Women mean business 277
Unit 9 City life 313
Unit 10 Geoghermal energy 351
Unit 11 Banking 389
Unit 12 Factories of the future 429