阅读下面短文，从短文后所给的四个选项中，选出可填入空白处的最佳选项．

　　Have you heard of the term“etiquette” And do you know that etiquette is not only a useful word 　　1　　 very useful to understand? Etiquette is not the same in every culture 　　2　　 in every situation．For example, standing very close to the person you are talking with is quite common in some Asian countries．However; if you do this in Europe, some 　　3　　 people might feel 　　4　　．Even in China, we all know that etiquette is not the same in all situations．Perhaps we think that talking loudly in our own homes is fine, but there are other places where talking loudly is 　　5　　．For example, most people would agree that talking loudly in a library, a museum, or a movie theater is 　　6　　．Even if you are with your friends, it is better to keep your voice 　　7　　 in public places．In fact, we should also 　　8　　 not to cough or sneeze loudly in public．

　　If we see someone 　　9　　 the rules of etiquette, we may politely give them some suggestions．Perhaps one of the most polite ways 　　10　　 ask someone, Would you mind doing this or Would yo mind not doing that．For example, if someone cuts 　　11　　 you in a line, you could ask them, Sorry, would you mind 　　12　　 the line? If someone is smoking on the busm you could ask, Excuse me, could you please 　　13　　 that cigarette? People don't usually like 　　14　　, so we have to be careful how we do this．

　　Although rules of etiquette can often be different, some rules are the same almost everywhere in the world! For example, 　　15　　 is almost never allowed．If you see someone you know doing this, you can ask them, Would you mind picking it up?

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　　Not all people like to work but everyone likes to play．All over the world men and women,boys and girls enjoy 　　1　　．Since the days of long ago,adults and children have called their friends together to spend 　　2　　,even days,playing games．

　　Sports help people to live 　　3　　．They help to keep people healthy and feeling good．When they are playing games,people 　　4　　 a lot．This is good for their health．Having fun with their friends makes them 　　5　　．

　　Many people enjoy watching others 　　6　　．In small towns,crowds(人群) meet to watch the bicycle races or the soccer games．In big cities,thousands 　　7　　 to see an ice-skating show or a baseball game．

　　What are your favorite sports? Is the weather 　　8　　 where you live? Then swimming is probably one of your sports．Boys and girls in China love to 　　9　　．There are wonderful beaches and there are beautiful 　　10　　 and lakes across the country．The weather is also good for swimming．

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