it's said that he will play______of he captain in the new movie.

问题描述:

it's said that he will play______of he captain in the new movie.
为什么是the role,不是a pole?
有什么区别?
为什么是the role,不是a role?
有什么区别

有了of后的一块说明这个role了,role就得用特指的the,如果没有说明role的定语,就用a.