Don't openly express annoyance at a professor or class.
不要公开对教授或班级表示不满。
2019全国卷3
If you are in need of a deadline extension, simply explain the situation to the professor.
如果你需要延期, 只需简单地向教授解释情况即可。
2019全国卷3
If there is truly a concern about a professor's professionalism or ability, be sure to use online course evaluations to calmly offer your comments.
如果真的担心教授的专业水平或能力, 一定要使用在线课程评估冷静地提出你的意见。
2019全国卷3