【步步高】（全国通用）2017版高考英语二轮复习 考前三个月 专题二 七选五课件.ppt

Consider Alternative Rental Options Major car rental companies might have an associated discount brand at your rental location，like Firefly for Hertz. 5 An independent or smaller local agency may fit your needs；like A1 or Lucky Owl in Honolulu.Many people prefer to check rates on Hotwire and Priceline，especially for last--minute rentals. 答案解析 答案 　C 解析 　本段标题是“Consider Alternative Rental Options”。第一句提到了一些大品牌，因此接下来应该讲一些小的品牌。C选项符合这一要求，而且与下一句为顺承关系。故选C。 第五步　确定排除，研究多余选项，确定排除理由，最终确定答案。 尽管答案都已经确定，但是为了避免失误，对多余的选项进行进一步的研究，确定它们和文章的主题和前后句意没有关联性之后，才是最终的结果。 返回 A (2016·全国Ⅰ) Secret codes(密码) keep messages private.Banks，companies，and government agencies use secret codes in doing business，especially when information is sent by computer. People have used secret codes for thousands of years. 36 Code breaking never lags(落后) far behind code making.The science of creating and reading coded messages is called cryptography. 精研真题　模拟演练 真题演练(一) 精研高考真题，寻找解题规律 答案　D 解析　考查综合分析能力。联系下一句“创设密码和破译密码总是相伴而生的”，可以推断此处意思是“只要有密码存在，人们总是千方百计地进行破译”。故选D项。 答案解析 There are three main types of cryptography. 37 For example，the first letters of “My elephant eats too many eels” spell out the hidden message “Meet me.” 答案　E 解析　考查联系上下文的能力。依据接下来的举例可知，这里讲的是选取每个单词的首字母这一方法来隐藏信息。因此答案为E。 答案解析 38 You might represent each letter with a number，for example. Let’s number the letters of the alphabet，in order，from 1 to 26.If we substitute a number for each letter，the message “Meet me” would read “13 5 5 20 13 5.” 答案解析 答案　G 解析　考查运用语境进行推断的能力。前文已经介绍了一种设置密码的方式，这里又介绍了另一种。故选G。G项中的another也是解题的关键标志词。 A code uses symbols to replace words，phrases，or sentences.To read the message of a real code，you must have a code book. 39 For example，“bridge” might stand for “meet” and “out” might stand for “me.” The message “Bridge out” would actually mean “Meet me.” 答案　F 解析　考查联系上下文的能力。空格前的a code book暗示答案可能为F项，通过验证，两句意思通顺自然，衔接紧密。故答案为F。 答案解析 40 However，it is also hard to keep a code book secret for long.So codes must be changed frequently. 答案　A 解析