As Lt. Governor.
From a lower rand soldier "Sir".
You failed to state where you are located. In the US it would be "Governor," or "Governor and Mrs."
Doctor.
I believe the correct address is 'Your Worship'.
Lahore
For American Consul Generals, the proper form for the addressee is The Honorable First Name Last Name. The proper salutation, however, is Dear Mr. (or Ms. or Mrs.) Last Name.
Ms. and then your last name.
Lieutenant colonels IS the plural. The singular form would be Lieutenant colonel.
The plural form of the noun 'lieutenant colonel' is lieutenant colonels.
Honorable __________ (Insert Supervisor's Name here)
Mr. or Madam President.
"My Lord" or "Your Lordship" are both acceptable.