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）
<p> <span word="A">A</span>组 2016～2017年各省市高考题（改编）</p><p> <span word="Passage">Passage</span> 1 (2016·全国Ⅰ)</p><p> 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。</p><p> <span word="Secret">Secret</span> <span word="codes">codes</span> (密码)<span word="keep">keep</span> <span word="messages">messages</span> <span word="private">private</span>.<span word="Banks">Banks</span>, <span word="companies">companies</span>, <span word="and">and</span> <span word="government">government</span> <span word="agencies">agencies</span> <span word="use">use</span> <span word="secret">secret</span> <span word="codes">codes</span> <span word="in">in</span> <span word="doing">doing</span> <span word="business">business</span>, <span word="especially">especially</span> <span word="when">when</span> <span word="information">information</span> <span word="is">is</span> <span word="sent">sent</span> <span word="by">by</span> <span word="computer">computer</span>.</p><p> <span word="People">People</span> <span word="have">have</span> <span word="used">used</span> <span word="secret">secret</span> <span word="codes">codes</span> <span word="for">for</span> <span word="thousands">thousands</span> <span word="of">of</span> <span word="years">years</span>.__1__ <span word="Code">Code</span> <span word="breaking">breaking</span> <span word="never">never</span> <span word="lags">lags</span>(落后) <span word="far">far</span> <span word="behind">behind</span> <span word="code">code</span> <span word="making">making</span>.<span word="The">The</span> <span word="science">science</span> <span word="of">of</span> <span word="creating">creating</span> <span word="and">and</span> <span word="reading">reading</span> <span word="coded">coded</span> <span word="messages">messages</span> <span word="is">is</span> <span word="called">called</span> <span word="cryptography">cryptography</span>.</p><p> <span word="There">There</span> <span word="are">are</span> <span word="three">three</span> <span word="main">main</span> <span word="types">types</span> <span word="of">of</span> <span word="cryptography">cryptography</span>.__2__ <span word="For">For</span> <span word="example">example</span>, <span word="the">the</span> <span word="first">first</span> <span word="letters">letters</span> <span word="of">of</span> “<span word="My">My</span> <span word="elephant">elephant</span> <span word="eats">eats</span> <span word="too">too</span> <span word="many">many</span> <span word="eels">eels</span>” <span word="spell">spell</span> <span word="out">out</span> <span word="the">the</span> <span word="hidden">hidden</span> <span word="message">message</span> “<span word="Meet">Meet</span> <span word="me">me</span>.”</p><p> __3__<span word="You">You</span> <span word="might">might</span> <span word="represent">represent</span> <span word="each">each</span> <span word="letter">letter</span> <span word="with">with</span> <span word="a">a</span> <span word="number">number</span>, <span word="for">for</span> <span word="example">example</span>. <span word="Let">Let</span>’<span word="s">s</span> <span word="number">number</span> <span word="the">the</span> <span word="letters">letters</span> <span word="of">of</span> <span word="the">the</span> <span word="alphabet">alphabet</span>, <span word="in">in</span> <span word="order">order</span>, <span word="from">from</span> 1 <span word="to">to</span> 26.<span word="If">If</span> <span word="we">we</span> <span word="substitute">substitute</span> <span word="a">a</span> <span word="number">number</span> <span word="for">for</span> <span word="each">each</span> <span word="letter">letter</span>, <span word="the">the</span> <span word="message">message</span> “<span word="Meet">Meet</span> <span word="me">me</span>” <span word="would">would</span> <span word="read">read</span> “135520175.”</p><p> <span word="A">A</span> <span word="code">code</span> <span word="uses">uses</span> <span word="symbols">symbols</span> <span word="to">to</span> <span word="replace">replace</span> <span word="words">words</span>, <span word="phrases">phrases</span>, <span word="or">or</span> <span word="sentences">sentences</span>.<span word="To">To</span> <span word="read">read</span> <span word="the">the</span> <span word="message">message</span> <span word="of">of</span> <span word="a">a</span> <span word="real">real</span> <span word="code">code</span>, <span word="you">you</span> <span word="must">must</span> <span word="have">have</span> <span word="a">a</span> <span word="code">code</span> <span word="book">book</span>.__4__ <span word="For">For</span> <span word="example">example</span>, “<span word="bridge">bridge</span>” <span word="might">might</span> <span word="stand">stand</span> <span word="for">for</span> “<span word="meet">meet</span>” <span word="and">and</span> “<span word="out">out</span>” <span word="might">might</span> <span word="stand">stand</span> <span word="for">for</span> “<span word="me">me</span>.” <span word="The">The</span> <span word="message">message</span> “<span word="bridge">bridge</span> <span word="out">out</span>” <span word="would">would</span> <span word="actually">actually</span> <span word="mean">mean</span> “<span word="Meet">Meet</span> <span word="me">me</span>.” __5__<span word="However">However</span>, <span word="it">it</span> <span word="is">is</span> <span word="also">also</span> <span word="hard">hard</span> <span word="to">to</span> <span word="keep">keep</span> <span word="a">a</span> <span word="code">code</span> <span word="book">book</span> <span word="secret">secret</span> <span word="for">for</span> <span word="long">long</span>.<span word="So">So</span> <span word="codes">codes</span> <span word="must">must</span> <span word="be">be</span> <span word="changed">changed</span> <span word="frequently">frequently</span>.</p><p> <span word="A">A</span>．<span word="It">It</span> <span word="is">is</span> <span word="very">very</span> <span word="hard">hard</span> <span word="to">to</span> <span word="break">break</span> <span word="a">a</span> <span word="code">code</span> <span word="without">without</span> <span word="the">the</span> <span word="code">code</span> <span word="book">book</span>.</p>
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