13. I feel my background is a good fit for this position and I am very interested.
我认为我的背景非常适合这个工作，而且我对这个工作也非常感兴趣。
还能这样说：
I think my background conforms to the position and I take interest in it.
In my eyes, my background is relevant to this position and I have an interest in it.
应用解析：
beneficial interest 受益权；
bond interest 债息，债券利息；
both principal and interest 连本带利，本利合计；
interest on deposit 存款利息

14. I'm leaving the present job just because of expiry of my employment contract.
我现在离职只是因为我的工作合同期满。
还能这样说：
I will quit my present job because my employment contract has expired.
The reason why I resign my present job is that my employment contract is due to withdraw expire.
应用解析：
present to mind 放在心上，记忆犹新；
present at 是……的见证人；出席……；
for the present 目前，现在

15. I left my office to care for my elderly mother in a distant city.
我当时为照顾住在遥远城市的年迈的母亲而辞职。
还能这样说：
I quitted my job in order to look after my elderly mother in the remote district.
I wanted to take care of my elderly mother in a distant city so I resigned my job.
应用解析：
do the office of host 尽主人之责；
in high office 身居高位；
come into office 上任，就职

16. I come here for an interview by appointment. Nice to meet you.
我是应约来面试的。非常高兴见到你。
还能这样说：
I am coming for an interview as required. I'm glad to meet you.
I have come at your invitation for an interview. It's my pleasure to meet you.
应用解析：
the appointment of sb. to an office 任命某人担任某事；
call on sb. by appointment 根据约会拜访某人

17. Sarah is being interviewed for a job.
莎拉正在面试。
还能这样说：
Sarah is having an interview.
Sarah is now accepting an interview.
应用解析：
jobs for the boys 为亲信安排工作；
do a hatchet job 进行恶意诽谤