Many earthquakes(地震)happen without warning, so it is important to know what to do wherever you are during an earthquake．Here are some top tips on how to stay safe in an earthquake．

　　?Keep a cool head．Worry may make bad decisions．Think about what you should do．The first several seconds are important．

　　?If you are indoors during an earthquake, hide under a heavy desk and protect your head．Stay away from windows and anything that could fall on you．

　　?If you are in a crowded hall away from the door, don't rush to the exit．You will find too many people trying to get out at the same time．Instead, hide under a desk or a table．Do not get into a lift during an earthquake!

　　?Stay in a safe area until you are sure it's OK to leave．Some aftershocks(余震)may follow an earthquake．These are as dangerous as the earthquake．

　　?If you are at home and you smell gas, open a window and leave the building quickly．

　　?If you are outdoors, find a clear place away from buildings, trees, street lights and power lines．

　　?If you are buried in debris(埋在废墟), you may make noises by knocking at the rocks．Shouting will use up your energy．You could be without help for up to 72 hours．Try to find some water and food．These are important for you．

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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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