5. We're looking for a part-time salesperson to promote our books to local bookstore.
我們正在尋找一個兼職銷售人員以向地方書店促銷我們的圖書。
還能這樣說：
We need a salesperson who can work temporarily to promote our books in local bookstores.
There is a part-time position for salesperson to promote our books in local bookstore.
應用解析：
White Book 白皮書（英美政府關于某一問題的官方報告）；
Yellow Book 黃皮書（法國等政府發表的報告書）；
Book of Books (=Books of God, Good Book) 《圣經》

6. I'm calling in reference to your administrative assistant position.
我打電話來詢問有關你們行政助理職缺的事。
還能這樣說：
Could you give me some information about your administrative assistant position?
Can you tell me some information about your administrative assistant position?
應用解析：
assistant engineer 助理工程師；
assistant manager 副經理

7. Do you need anyone with a Business English background?
你們需要有商務英語背景的人才嗎？
還能這樣說：
Do you lack of some employee with Business English knowledge?
Does your company have any openings in Business English?
應用解析：
A pretty business!
好麻煩的事情！真糟糕！

8. We have a position for an interpreter.
我們提供口語翻譯一職。
還能這樣說：
We need an interpreter.
An interpreter is needed in our company.
應用解析：
need指急需；
requisite指導必需品、對某一特殊目的所不能缺少的東西；
necessity屬正式用語，指必要、對不可缺少東西的需要。