One possible version：

We high school seniors have many tests or exams. We have both achieved success and suffered from failure. Different students take different attitudes to failure. Some fall in low spirits when they don’t do well in the exams. They often lose heart and no longer study as hard as before.But most students take an active attitude towards failure. They encourage themselves to be self-confident. They find out and analyze the causes so that they will no longer make similar mistakes.

I agree with those with active attitudes. As we all know, failure is the mother of success. Even great men may have failed many times before they succeeded. So we must deal with our failure correctly.