This is ______book Ibought yesterday.Isn't it ___interesting one?

问题描述:

This is ______book Ibought yesterday.Isn't it ___interesting one?
A.the ;the B.the ;a C.a ;the D.the;an
选哪个,为什么

D.the;an
the 定冠词表特指
interesting 前的补丁冠词用an