先生は明日学校に___そうです。
Q. Which honorific verb correctly replaces 来る for the teacher?
Translation
I hear the teacher will come to school tomorrow.
Explanation
いらっしゃる is the honorific (sonkeigo) verb for 来る/行く/いる, used to elevate the teacher. 参る and 伺う are humble (kenjougo) verbs for one's own actions, and おる is the humble form of いる.