题目内容：
阅读短文，回答问题：I consider myself something of an expert on apologies. A quiet temper has 11 me with plenty of opportunities to make them. In one of my earliest 12 , my mother is telling me, "Don't watch the 13 when you say 'I'm sorry'. Hold your head up and look the person in the 14 , so he'll know you 15 it."
My mother thus made the key point of a (n)16 apology: it must be direct. You must never 17 to be doing something else. You do not 18 a pile of letters while apologizing to a person 19 in position after blaming him or her for a mistake that turned out to be your 20 You do not apologize to a hostess, whose guest of honor you treat 21 , by sending flowers the next day without mentioning your bad 22 One of the important things we should do for an 23 apology is a readiness to 24 the re-sponsibility for our careless mistakes. We are used to making excuses, which leaves no 25 for other person to 26 us. Since most people are open-hearted, the no-excuse apology is better. Leave both parties feeling 27 about themselves. That, after all, is the 28 for every apology. It 29 little whether the apologizer is wholly or only partly at fault: answering for one's 30 encourages others to take their share of the blame.
A．provided
B．mixed
C．compared
D．treated
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