Choose the option that best completes the gap(s).You may not have heard the last word on the matter _____ ?

Answer Details

The option that best completes the sentence is "have you". The sentence is a statement expressing that the person addressed might not have heard everything that has been said about a certain matter. The phrase "have you" is used to ask whether the person has heard everything or not. Therefore, "have you" is the most suitable option to complete the sentence.