The teacher feels that this course is going to fail, and the results have not come out yet. How can he plead with the teacher over the phone? What should I say?

Personally, the key reference is your usual performance and whether the teacher is good or not;

Call ... and ask the teacher sincerely: Just say hello, Mr. XXX, I'm ... Did you get the result? I feel that I was in a bad state during the exam, and I feel a little uneasy inside. ...

(it depends, free to play. )