A组　2016～2017年各省市高考题（改编）

　　Passage 1　(2016·全国Ⅰ)

　　根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

　　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.__1__ Code breaking never lags(落后) far behind code making.The science of creating and reading coded messages is called cryptography.

　　There are three main types of cryptography.__2__ For example, the first letters of “My elephant eats too many eels” spell out the hidden message “Meet me.”

　　__3__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 “135520175.”

　　A code uses symbols to replace words, phrases, or sentences.To read the message of a real code, you must have a code book.__4__ For example, “bridge” might stand for “meet” and “out” might stand for “me.” The message “bridge out” would actually mean “Meet me.” __5__However, it is also hard to keep a code book secret for long.So codes must be changed frequently.

　　A．It is very hard to break a code without the code book.

【2017版《三年高考两年模拟》高考英语汇编专题：专题14 阅读七选五（含解析）】相关文章：

★ 2017高考四川省广安市英语阅读理解一轮系列训练：27（含解析）

★ 2017年高考英语二轮复习精品资料：专题15 完形填空（押题专练）（原卷版）

★ 2017届高考英语二轮复习书面表达限时测验：6（含解析）

★ 山东省济宁市2016年高考英语复习：条件状语从句（含解析）

★ 2017届高考英语二轮复习书面表达限时测验：1（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五：创新押题（含解析）

★ 2017届高考英语二轮复习课时训练：18（含解析）

★ 【课堂新坐标】2017届高考英语（通用版）二轮复习短文改错专题训练：模式3 错一词（含解析）

★ 2017届高考英语二轮复习课时训练：12（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍语法填空：体验真题（含解析）