选择题__old man with __book in his hand is __ teacher.

问题描述:

选择题__old man with __book in his hand is __ teacher.
___old man with __book in his hand is __ teacher.
A. an,a,a B. the,the,a C.the,a,a Dan,the,the
选择!

C
理由很简单,但说不清.