Unit1 Trip to the United States of America 1
Unit2 Trip to Canada 16
Unit3 Trip to the United Kingdom 30
Unit4 Trip to France 45
Unit5 Trip to Italy 58
Unit6 Trip to Japan 70
Unit7 Trip to Singapore 84
Unit8 Trip to Australia 97
Unit9 Trip to Brazil 110
Unit10 Trip to Egypt 124
参考文献 136