Question

4．Emergencies（紧急情况）don't happen very often．But when they do，you want to get help first．No one wants to spend time looking up the phone numbers．
  In 1568，the Untied States government wanted one number that people could call for emergencies．They decided that 911 was easy to remember and people could dial it quickly．The very first 911 call was made on February 16，1965．in Alibama．Today，911 is used for emergencies in most parts of the United States and many parts of Canada．
  Other countries may use other numbers．In Great Britain，it's 959．If you're not sure which emergency number is used in your area，check your phone book．
  When to call
  Never call 911 as a joke or just to see what might happen．The only time you should call 911 is if a person is badly hurt or in danger right now!
  When in an emergency call
  When you dial the 911 operator（接线员），it's always OK to give out your information．Speak slowly and clearly when you explain what's happening．What happened？Where are you？Who needs help？
  Don't hang up（挂断）！
  If you have to call 911，do not hang up until the operator tells you it's OK to do so，That way，you can be sure that the operator has all the information to offer help fast．
  A dog named Faith dialed 911 when her owner who was in a wheelchair fell and needed help．She had been taught to use a speed-dial（快递拨号）function．
46．The emergency number 911 was first used inBin the USA．
A.1958   B.1968  C.1978   D.1999
47．Why was 911 chose to be the emergency call？C
A．Because other countries also used the number．
B．Because it was suggested by the phone company．
C．Because it was simple and easy to remember and dial．
D．Because it was also used in many parts of Canada．
48．People can't call 911 whenB．
A．a bus hits a boy badly 
B．a girl feels bored 
C．an old lady falls off the stairs，unable to stand up
D．some people can't get out of a burning building
49．Which is the right thing to do？A
A．Wait for the operator's words to end the call．
B．Tell the operator what his happened and hang up．
C．Test if your phone can get through to 911．
D．Tell the operator everything as quickly as possible．
50．Which is NOT true according to the passage？D
A.911 is an emergency number almost throughout the United States．
B．We haven't got a worldwide univer（通用的）emergency number yet．
C．Usually phone books list emergency call numbers．
D．The dog Faith pressed the three numbers 9-1-1．

Answer 1

分析 突发事件（紧急情况）并不是经常发生的．但是当它们发生时，你想在第一时间得到帮助．没有人愿意花时间查找电话号码．
1568年，美国政府需要一个能拨打紧急情况的号码，他们决定911容易记住并且人们可以快拨．第一个911电话是在1968年2月16日的阿拉巴马州．今天，911被用于在美国大部分地区和加拿大的许多地方的突发事件．
其他国家可能使用其他数字，在英国，它是959，如果你不确定在你的地区使用的是哪个突发情况的号码，请核实你的电话簿．
什么时候打电话
不要作为一个笑话或只是想看看有什么可能发生的事打911，你应该打电话给911的唯一时间是如果一个人被严重伤害或正在危险中！
在紧急呼叫时
当你拨打911接线员，传达出你的信息就好，当你解释发生了什么事的时候说话要缓慢而清晰．发生了什么？你在哪里？谁需要帮助？
不要挂断！
如果你必须拨打电话911，不要挂断，直到接线员告诉你可以挂断电话了你再挂断．这样，你就可以确信接线员已经有了所有提供快速帮助的信息．
一只名叫信仰的狗当她的主人在轮椅上摔倒了，需要帮助时拨打了911．她曾经被教过使用快速拨号功能．

解答 46．B 细节理解题．题干意为急救电话号码首次在美国使用是在哪年？由第二段第三句The very first 911 call was made on February 16，1968．in Alibama．可知是在1968年首次使用的．故选B．
47．C 细节理解题．由第二段第二句They decided that 911 was easy to remember and people could dial it quickly．可知，因为911容易被记住，人们能快速拨出．故选C．
48．B 细节理解题．由文中The only time you should call 911 is if a person is badly hurt or in danger right now!可知只有B项与个人情绪有关，不属于紧急情况的范畴，故选B．
49．A 综合理解题．由倒数第二段第一句If you have to call 911，do not hang up until the operator tells you it's OK to do so，可知B项错误；由第四段第一句Never call 911 as a joke or just to see what might happen．可知C项错误；由倒数第三段第二句Speak slowly and clearly when you explain what's happening．可知D项错误．由第六段的第一句If you have to call 911，do not hang up until the operator tells you it's OK to do so可知A说法正确，故选A．
50．D 推理判断题．题干意为：根据短文内容，那一项不正确？由最后一段的内容A dog named Faith dialed 911 when her owner who was in a wheelchair fell and needed help．She had been taught to use a speed-dial（快速拨号）function．可知这只狗不是按下了911三个数字，而是使用了电话的快速拨号功能，表述错误．故选D．

点评 这是一篇说明文，介绍了911电话的有关情况．题目大多涉及细节理解方面．做这类题一定要向原文找答案，找出相对应的句子，根据意义去选择．还要具备一定的推理判断能力，其出发点还是从原句找到推理的线索，例如50题．