Do not shut the door. ?

The phrase "Do not shut the door" is a command that instructs someone to refrain from closing the door. It is imperative in nature, expressing a directive. When we analyze the provided options, we need to find one that captures this imperative meaning effectively.

Option A, "The door is not to be shut," is a passive construction that conveys a similar message but lacks the strong command inherent in the original sentence. Option B, "The door may not to be shut," incorrectly implies permission rather than a direct prohibition. Option D, "The door will not be shut," indicates a certainty about an outcome but fails to express the immediate instruction to keep the door open.

Option C, "Let not the door be shut," stands out as it retains the imperative sense while using a slightly more formal or archaic construction. It commands the listener to ensure that the action of shutting the door does not occur. By using "let not," it also emphasizes the idea of preventing the door from being shut, thereby aligning closely with the original instruction in terms of both meaning and tone. Thus, Option C is the best choice for conveying the intent of the original command.