Describe a period of time from your studies that was the most difficult for you You should say: • When it was • Why was it hard • What you were doing at that time And whether you felt you were successful in overcoming the difficulties

I would mention the time when I prepared for my semester test. In case you don't know, a semester test in my country is a test that assesses our ability after a semester of studying. The reason it was hard is that this test determines our performance during the semester, so it is very significant. [...]