What is a suitable completion for: "There is ............................. rude"?

The phrase "There is no excuse for being rude" effectively conveys a strong stance on unacceptable behavior. It indicates that regardless of the circumstances, rudeness is not justified, emphasizing the idea that one should always strive to be polite and respectful. This choice aligns with the norm of promoting courteous interaction in society.

The other options do not provide the same clarity or strength of meaning. "Some excuse for being" suggests that there might be valid reasons for rudeness, which contradicts the intended message. "Little reason to be" implies that there are some reasons that could allow for rudeness, which weakens the assertion. Lastly, "every reason not to be" changes the focus slightly; while it implies a negative stance toward rudeness, it does not directly convey the absence of justification as powerfully as stating that there is "no excuse." Thus, the chosen completion effectively communicates an unequivocal stand against rudeness.