Question

Fill in the blank with the most appropriate word.

There was a knock _____the door.

• A. Of
• B. In
• C. At
• D. For

Answer 1

Answer: (C)

At

A preposition is a word which comes before a noun or a pronoun and establishes a relationship between the elements of a clause or words. Option C)at is correct as it indicates a specific location. The other options are wrong as of, in, and for indicate possession, inside something, and a purpose respectively. These uses don't fit in the given question. The correct answer is C)at.