5. Is it the only reason why you don't hire me?
这是你们不雇用我的唯一原因吗？
还能这样说：
Is just the reason ou reject me?
You don't accept me just because this reason?
应用解析：
hire有雇用、短期租借的意思；
lease指租期、租金、租约、租赁（房屋、土地等）；
let指出租（房屋、地产等）；
rent指较长期地租用或出租（房屋、土地等）。

6. It's glad to be told the news.
很高兴被告知这个消息。
还能这样说：
I am glad to hear the good news.
Hearing the good news excites me.
谚语：
Bad news has wings.
好事不出门，恶事传千里。

7. Your main responsibility is to deal with the tasks that involve a lot of paper filing and typing.
你的主要任务是文件归档和打字工作方面的事情。
还能这样说：
You're mainly responsible for the tasks of paper filing and typing.
You're in charge of paper filing and typing.
应用解析：
cover paper 封面纸；
craft paper 牛皮纸；
credit paper 信用证券；
working paper 工作文件；
wood paper 木制纸

8. You need to work on trial for three months from now on.
从即日起计算，前3个月是您的试用期。
还能这样说：
The probationary period is 3 months from commencement date.
You are hired for a three months period on a trial basis.
应用解析：
trial指对人或物进行试验以确定其效果或价值等；
experiment指为研究某事物的发生或为获得新知识而进行仔细试验的过程；
test指通过试验、使用、比较等就其是否正确、合格等方面作出评定。