I was monitor in primary school, and I got first prize in elementary school graduation exam .

我在小学里是班长，学习成绩优秀，在小学毕业考试中还取得了全段第一的好成绩。

I'm doing well in all my studies, besides I'm the monitor of my class. in the graduation exam, I have got good grade as No.

of 全段（什么意思）。我在小学里是班长，学习成绩优秀，在小学毕业考试中还取得了全段第一的好成绩。