1. Consult the teacher: First, you can consult the teacher of the selected elective course to find out the specific reasons and follow-up remedial measures.

2. Complain: If you think the evaluation given by the teacher is unfair or inconsistent with the actual performance, you can complain to the relevant departments of the relevant colleges or schools.

3. Take the make-up exam: If there are corresponding make-up exam opportunities for elective courses, you can sign up for the make-up exam within the specified time and get qualified results.

4. retake this course: if an elective course has a great influence on your study, you can choose to retake this course and strive for better results.