(1/2)It is a world of wonders,____world where anything can happen.空中为什么用

问题描述:

(1/2)It is a world of wonders,____world where anything can happen.空中为什么用

后面的world是第二次出现,所以用the .
a world of wonders,a world where anything can happen 是两个并列结构.
所以都用同样的冠词 a ,
没有特指,只是陈述事实.所以不用the