上个月我们年级举办了数学竞赛，许多同学也参加了竞赛。

　　我擅长于数学，经过努力我获了奖。老师表扬了我，同学也为我高兴。

　　译文：

　　last month there was a math contest in our grade. a lot of students joined it.

　　i prepared for it carefully and worked hard. i got the prize and our teacher praised me. my classmates were glad for me.