The correct punctuation for a Medical Doctor is "Dr." before their name. For example, Dr. Jane Smith.
Period after suffix
The correct punctuation for "doing business as" is written as "d/b/a" or "dba." It is commonly used in legal and business contexts to indicate a business operating under a different name.
The correct punctuation for "Sam will go into the water" is the sentence as-is, with no additional punctuation needed.
The correct punctuation for "Mlle" is a period at the end, as it is a shortened form of the French word "Mademoiselle."
The correct punctuation change is: "The composer had a preponderance."
The correct punctuation for "The holidays, in my opinion, are depressing."
Mrs. James's Room is correct. With only one exception (the name Jesus), the possessive form of names ending in s is exactly the same as those that don't end in s.
The correct punctuation for the sentence is: "Can you point me towards the elevator?"
The correct punctuation for "Sam is scared" is a period (Sam is scared.).
The correct punctuation for someone's age after their name is single quotation marks. For example: "John is 30 years old."
The correct punctuation for "highway" is to simply write it as is, without any additional punctuation.