Does Dr. means PH.D or doctor? I received a message from a foreigner, in which the signature is DR. ###. Can anybody explain? Thanks.

Urgent \ take an imprint If the hotel reception says "I will take an imprint.." What does that mean? Please help.

already + past tense Can I use the word "already" in a past tense sentence. I submit the report already. Or other tense, is the sentence "the light is on already" wrong? Please help.

an arm’s length arrangement What is the meaning of " an arm’s length arrangement "

Please help to explain the meaning of a sentence "The Advertising Standards Authority judges advertisements,direct marketing and sales promotions against a set of codes and its rulings are made independently of both government and the advertising industry." here "be made independently of" means....

accommodation If my company provide the employees with the accommation on the business trip. Does that mean my company cover the living place and the food?

expense account Is "expense account" a company benefit? What do I have if the company provide me a company account? is that just a banking account opened by my company?

receipt / invoice What is the difference between receipt and invoice?

talk behind one's back What is the meaning of "talk behind one's back"? Does that mean gossiping another person or not telling the real thought to the person? Thanks.Is that same as "two-faced"?