------How are you doing?

------非常好：super.    Terific.     Couldn't  be better.    Pretty good.

        还可以：OK.   Preety well.    Not bad.   So-so.  I am still alive and kicking.

        做一天和尚，撞一天钟：Another day, another dollar.

Keeping busy before oral defense is  all in the day's work .  答辩前期不忙就怪了。

Where  have you been fooling around ?     最近去哪里鬼混了？

Happy birthday and many happy returns of the day .  生日快乐，岁岁有今朝。

ralative  亲戚  in-laws 亲家  nephew 侄子  外甥  niece 侄子 外甥女  colleague 同事  superior 上司

tutor  导师  coach 教练 roommate teammate partner  country fellow 老乡

-----nice to meet you.

-----Same here.

We went to the same school .我们是校友。

We went to school together.  我们是同级同学。

You are 2 years my senior / junior .   你比我高、低两届

She is my junior .他是我师妹。  He is my senior .  他是我师兄。

alumnus  男校友   alumna 女校友 undergraduate 在校生 postgraduate  研究生 ex-wife 前妻