a secretary or administrative assistant working exclusively for one particular person:

P_______ A________

(a)  

the activity of keeping good relationships between an organization and the general public:

P_____ R________

(a)  

a large building for storing things before they are sold, used, or sent out:

W (a)  

THE (a)   is a person in charge of a meeting or organization (synonym for president)

a journey taken for business purposes:

B________ T___

(a)  

the department that deals with finding and managing employees:

H____ R________

(a)  

a time or day by which something must be done:

d (a)  

the most important office of an organization / company:

H___ O_____

(a)