There is ___ book on the shelf ,would you please get ___ book for me

问题描述:

There is ___ book on the shelf ,would you please get ___ book for me
填a,the还是the,the,请说明理由,

前者泛指 存在一本书 有一本书
后者特指 专指给我拿架子上的那本
a,the