单选题
I consider myself something of an expert on apologies. A quiet temper has【C1】______me with plenty of opportunities to make them. In one of my earliest【C2】______, my mother is telling me, "Don' t watch the【C3】______when you say, I' m sorry. Hold your head up and look the person in the【C4】______, so he'll know you【C5】______it." My mother thus made the key point of a(n) 【C6】______apology: it must be direct. You must never【C7】______to be doing something else. You do not【C8】______a pile of letters while apologizing to a person【C9】______in position after blaming him or her for a mistake that turned out to be your【C10】______. You do not apologize to a hostess, whose guest of honor you treat【C11】______, by sending flowers the next day without mentioning your bad【C12】______. One of the important things we should do for an【C13】______apology is a readiness to【C14】______the responsibility for our careless mistakes. We are used to making excuses, which leaves no【C15】______for other person to【C16】______us. Since most people are open-hearted, the no-excuse apology is better. Leave both parties feeling【C17】______about themselves. That, after all, is the【C18】______for every apology. It【C19】______little whether the apologizer is wholly or only partly at fault: answering for one's【C20】______encourages others to take their share of the blame.