同学的英文怎么写

　　她觉得自己就像一个告发了同班同学的五年级学生。

　　She felt like a fifth-grader who had snitched on a classmate.

　　他向他的同学玛丽表白了他的友情。

　　He made a profession of friendship to his classmate mary.

　　她遇见几个老同学。

　　She met up with some of her old school friends.

　　今天早上我们好像有几位同学没到。

　　We seem to be missing some students this morning.

　　是什么使得她有别于班上其他同学呢？

　　What was it that distinguished her from her classmates?