An exam that tests students' knowledge for half a semester helps students formally test their usual learning level. According to this result, students can adjust their learning mentality and methods in time and carry out the next stage of learning more efficiently. The mid-term exam mainly examines students' academic performance in the first half of the semester.

Students should prepare well before the exam, review in time, adjust their mentality and do more questions. These measures are conducive to the examination. They should not put too much pressure on themselves. They should relax. You can take a deep breath or close your eyes for 30 seconds before the exam to relieve tension and avoid affecting your performance.

I hope it can help you solve the problem.