同学的单词怎么写

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

　　她觉得自己就像一个告发了同班同学的五年级学生。

　　He made a profession of friendship to his classmate mary.

　　他向他的同学玛丽表白了他的友情。

　　He turned around, and I recognized him as a former classmate.

　　他转过来，我才认出是位老同学。

　　My husband was getting nowhere in his own so he decided to cast in his lot with his former classmate and now they're successfully in business together.

　　我丈夫一个人举足艰难，因此他决定和他的老同学合伙干，现在他们在一起干得很有成就。

　　One day I met a former classmate of mine who was made a lot of money running a sideline ．

　　一天,我遇到了我以前的一位同学,他经营副业赚了很多钱。