俗话说“条条大路通罗马”，背诵
baby boom generation (婴儿潮世代)
handedness (使用右手的习惯)
the growth of cities (城市的形成)
urban conservation (城市的保护与维持)
urban renewal (都市更新)
the development of illumination (照明的发展)
hotel (旅馆)
postal service (邮政)
America’s quilting history (美国棉被的历史)
the quilting bee (殖民时期妇女们缝棉被聚会)
folk culture v.s. popular culture (民俗文化与大众文化)
popular culture (大众文化)
family change (家庭的改变)
history of postal services in the unitedstates (美国邮政的历史)
the pony express (小马快递)
education & schooling (受教育与上学)
success vs. higher education (成功与高学历)
food preservation (食物保存)
the history of food preservation (食物保存的历史)
icebox (冰箱)
water routes to the sea (通往大海的水道)
Mississippi River (密西西比河)
new Orleans (纽奥良)
Los Angeles (洛杉矶)
uncle Sam (山姆大叔)
mount Rushmore national memorial (罗斯摩尔山国家纪念公园)
war of the worlds (世界大战小说对传播媒体的影响)
thanksgiving day (感恩节)
black Friday (黑色星期五)
factory outlet (畅货中心)
Macy’s thanksgiving dayparade (纽约梅西百货：感恩节大游行)
groundhog day (土拨鼠日)
Christmas (圣诞节)
linsey-woolsey (棉毛织品)
new England furniture (新英格兰家具)
new york city (纽约)
Manhattan (曼哈顿)
Rockefeller center (洛克斐勒中心)
the statue of liberty (自由女神像)
history of new york city (纽约的历史)
formation of greater new york (大纽约地区的形成)
suspension bridge (吊桥)
Erie canal (伊利运河)
Philadelphia (费城)
Benjamin Franklin
Amish (门诺教)
Chicago (芝加哥)
the great Chicago fire (芝加哥大火)
great lakes (五大湖)
how the lakes were formed (五大湖如何形成)