请各位高手给看看有没有语法错误.

问题描述:

请各位高手给看看有没有语法错误.
The doctor has already submitted the document to HR office.Due to HR staff has on a business trip on 5Dec2012.The another staff promised that he will have resolved this event by the end of the Dec2012.

The doctor has already submitted the document to the HR office.Due to the HR staff is on a business trip from 5 Dec 2012,another staff promised that he would have resolved this event by the end of the...