阅读下面短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。

　　It is April in the United States, the time of year when most of our public schools have their Spring Breaks．Spring Break is a week's vacation during the second term of each school year．Students look forward to it as it is seen as a time of fun, a time for hanging out with your friends or taking a road trip．This is especially true for those whose time in school is nearing an end, that is, the seniors．After Spring Break, they will only have a month and a half or so of classes left before they finish this level of education and move on to the rest of their lives．This is an exciting and bitter time for these people．Spring Break is the beginning of saying good-bye to childhood and childhood friends, though few seniors would still consider themselves children．

　　Many seniors take a road trip for their last Spring Break．This means that they travel in a car with some friends and drive somewhere, often some where warm if they live in the north where it has been cold and snowy for some months．Florida is a popular place．During this time they will hang out with their friends, go to parties, and meet new people．It's a period of relaxation before the final push to finish their basic education．Then again, for some seniors, it marks something serious that teachers call“seniorities”．This is not a real disease, but it is a word that describes a group of problems seen in many seniors in their last days in school．The main problem is a lack of desire to do anything other than for fun．Schoolwork becomes less and less important．After Spring Break, there are a couple of their activities that occur for seniors only．At the high school I attended, we had a senior breakfast．This was a gathering of all the seniors in the school for a breakfast．Some teachers came too．At this event, we gave out awards on which the senior class had voted．These awards included“Best Smile”and“Most Likely to Succeed”, among others．

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　　What are the basic elements(要素)of good manners? Certainly a strong sense of justice is one; courtesy(谦恭)is often 　　1　　 more than a highly developed sense of fair play．A friend of mine once told me about a time he was 　　3　　 along a narrow, unpaved(未铺柏油的)mountain road．　　3　　 was another car that produced clouds of 　　4　　, and it was a long way to the nearest 　　5　　 highway．Suddenly, at a 　　6　　 place, the car ahead pulled off the road．　　7　　 that its owner might have engine trouble, my friend stopped and asked if anything was wrong．“　　8　　,”said the other driver, “but you’ve endured(忍受)my dust this far; I’ll 　　9　　 with yours the rest of the way．”

　　Another element of courtesy is empathy(善解人意), a 　　10　　 that enables a person to see into the mind or heart of someone else, to understand the pain or 　　11　　 there and to do something to minimize it．A man 　　12　　 alone in a restaurant was trying to open the cap of a beer bottle, 　　13　　 he couldn’t do it because of badly injured 　　14　　．He asked a young busboy to help him．The boy took the bottle, turned his back 　　15　　 and loosened the cap without difficulty．Then he 　　16　　 it again．Turning back to the man, he 　　17　　 to make great efforts to open the bottle without success．　　18　　 he took it into the kitchen and returned shortly, saying that he had managed to loosen it－but only with a pair of pliers(钳子)．

　　Yet another element of politeness is the ability to treat all people 　　19　　, in spite of all status or importance．　　20　　 when you have doubts about some people, act as if they are worthy of your best manners．You may also be astonished to find out what they really are．

　　Courtesy is the key to a happier world．