第二节 阅读填空
阅读短文及文后A~E选项,选出可以填入46~50各题空白处的最佳选项。
Smoke alarms(报警器)
House fires cause many deaths each year and a large number of these fires are unfortunately set by children.___46___Kids must understand that they’d better not play with fire. You should keep matches and lighters out of their reach.
___47___ The main job of such an alarm is to protect you while you're asleep. You should have a smoke alarm outside each bedroom and on each floor of your home. You ought to have two plans for getting out of your house if there is a fire and practise these plans in the dark with your family.
A smoke alarm warns you of the danger. ___48___Take action immediately. When you come to a closed door, check it with the back of your hand. If it feels hot, there may be smoke or fire behind the door, so take care. Once you are out of your house, call the fire department from a neighbor's house. If a family member or a pet is caught inside, you shouldn’t go back in. Firemen know how to perform rescues safely.
___49___ Change the batteries at least once a year. You should use the test button each month to see if the alarm and batteries are still working. A smoke alarm lasts about ten years. You ought to change it even if it seems to be working.
途东科广慧040b法升优软a200技4427件有根元407c学限方上公1b271a68-网司 About two out of three fire deaths happen in homes with no working smoke alarms.___50___
A. Most of these deaths can be avoided
B. But when you hear it, you don t have much time
C. A smoke alarm is only good if it's working properly
D. So, it's important to teach them that fire is a tool, not a toy
E. A smoke alarm greatly reduces your chances of being hurt in a fire
【答案】46. D 47. E 48. B 49. C 50. A
【解析】
【分析】
房屋火灾每年都造成很多人死亡，并且很多火灾都是有儿童引起的，因此有必要教给孩子们不要玩火。为了以防万一，家里可以安装烟雾报警器，它能大大减少火灾中受伤的可能性。这篇短文对使用烟雾报警器给了我们一些建议。
【46题详解】
空前这句话House fires cause many deaths each year and a large number of these fires are unfortunately set by children.提到“很多火灾都是由孩子们引起的”;空格后Kids must understand that they’d better not play with fire提到“孩子们最好不要玩火”，前后为因果关系，因此这里应起到承接上文，并引出文章主题的作用，故应选D，意为“因此教给他们火是工具，而不是玩具是很重要的”。
【47题详解】
下句话The main job of such an alarm is to protect you while you're asleep提到了烟雾报警器的作用，这个空位于该段的第一句话，应该是对整段内容的概括，故应选E，意为“烟雾报警器大大降低了你在火灾中受伤的可能性”。
【48题详解】
根据空格前A smoke alarm warns you of the danger.可知，烟雾报警器可以警告我们有危险;空格后的这句话Take action immediately.要我们马上采取行动，因此当你听到烟雾报警器响的时候，逃离的时间就不多了，故应选B，与空后形成因果关系。
【49题详解】
根据这一段的内容Change the batteries at least once a year. You should use the test button each month to see if the alarm and batteries are still working.可知，这一段中告诉我们要注意更换烟雾报警器的电池，每个月应使用测试按钮，看看报警器和电池是否还在工作。故这一段是想告诉我们烟雾报警器只有在正常工作时才是管用的。故应选C。
【50题详解】
空格前About two out of three fire deaths happen in homes with no working smoke alarms提到，大约有三分之二的火灾死亡事件都是由于没有烟雾报警器，A选项中的these deaths呼应了上句话的内容，故应选A，意为“大多数死亡案例是可以避免的”。
【点睛】这篇短文是一篇科普说明文，讲述了烟雾报警器的作用。文章主题明确，结构清晰，比较容易理解。题型是选择适当的句子补充短文，题目中给出了五个句子，要求填到文章中的五个地方，这一题型考查的是学生们的阅读理解能力以及逻辑推理能力。做题时，应先通读短文，了解大意;然后阅读后面的五个句子，弄清楚每句话的意思，然后分析文章上下文的逻辑关系，尤其注意空前后的句子，选择最佳的答案。注意先易后难，容易的题目解决了，剩下的句子少了，解题的难度就降低了。例如第3小题，根据空格前A smoke alarm warns you of the danger.可知，烟雾报警器可以警告我们有危险;空格后的这句话Take action immediately.要我们马上采取行动，因此当你听到烟雾报警器响的时候，逃离的时间就不多了，故应选B，与空后形成因果关系。
编辑：小徐