Special care should be taken when you write the date. All-figure date, such as All04/03/03, is usually avoided in formal writing. In Britain, it refers to the fourth of March, 2003, and is written as 4 March, 2004 or 4th March, 2003. In America, 04/03/03 means the third of April,2003, and is written as April 3, 2003 or April 3rd, 2003.
3. The Salutation /Greeting
The greeting in a business letter is always formal. It normally begins with the word "Dear" and always includes the person's last name. It normally has a title. Use a first name only if the title is unclear--for example, unclear--for you are writing to someone named "Leslie," but do not know whether the person is male or female. There can be various types of honorific titles, such as Mr., Miss, Mrs., Ms., Dr., Prof., Pres. (President 大学校长、总统等), 大学校长、总统等), Rev. (Reverent 神职人员) and Hon. 神职人员) (Honourable 议员、大使、市长等) 议员、大使、市长等)