— What is theof the World Expo（世博会）? — It is “Better City Better Life”. A.song B.the

问题补充：

— What is theof the World Expo（世博会）?

— It is “Better City, Better Life”.

A.song B.theme C.custom

答案：

解析：根据常识我们知道“Better City, Better Life”是上海世博会的主题，theme表示主题的意思，与句意较符合，故选B。