Haveyouheardoftheterm"etiquette（礼节）"？Anddoyouknowthatetiquetteisnotonlyausefulword（16）___veryusefultounderstand？Etiquetteisnotthesameineverycultureorineverysituation．Forexample，（17）__

　　Have you heard of the term"etiquette（礼节）"？And do you know that etiquette is not only a useful word （16）___ very useful to understand？

　　Etiquette is not the same in every culture or in every situation．For example，（17）___ very close to the person you are talking with is quite common in some Asian countries．However，if you do this in Europe，some European people might feel （18）___．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 some other places where talking loudly is not （19）___．For example，most people would agree that talking loudly in a library，a museum，or a movie theatre is rude．Even if you are with your friends，it is better to keep your （20）___ down in public places．In fact，we should also try not to cough （21）___ sneeze loudly in public．

　　If we see someone （22）___ the rules of etiquette，we may politely give them some suggestions．Perhaps one of the most polite ways （23）___ ask someone．"Why not do this？"For example，if someone cuts in front of you in a line，you could ask him，"Sorry，would you mind （24）___ in the line？"If someone is smoking on the bus，you could ask，"Excuse me，could you please （25）___ that cigarette？"People don't usually like to be criticized，so we have to be careful how we do this．

　　16．A．howeverB．althoughC．notD．but also17．A．StandingB．To standC．StandD．To standing18．A．happyB．excitedC．comfortableD．uncomfortable19．A．to allowB．allowC．allowedD．allowing20．A．soundB．noiseC．speechD．voice21．A．orB．andC．butD．for22．A．followingB．breakingC．to breakD．bre