六级冲刺练习阅读（123）
<p> <span word="The">The</span> <span word="future">future</span> <span word="population">population</span> <span word="will">will</span> <span word="be">be</span> <span word="older">older</span> <span word="than">than</span> <span word="today">today</span>, <span word="and">and</span> <span word="this">this</span> <span word="in">in</span> <span word="turn">turn</span> <span word="will">will</span> <span word="change">change</span> <span word="the">the</span> <span word="patterns">patterns</span> <span word="of">of</span> <span word="social">social</span> <span word="demands">demands</span>. <span word="However">However</span>, <span word="Mexico">Mexico</span> <span word="will">will</span> <span word="still">still</span> <span word="be">be</span> <span word="far">far</span> <span word="from">from</span> <span word="the">the</span> <span word="aging">aging</span> <span word="societies">societies</span> <span word="that">that</span> <span word="will">will</span> <span word="most">most</span> <span word="likely">likely</span> <span word="prevail">prevail</span> <span word="in">in</span> <span word="the">the</span> <span word="industrialized">industrialized</span> <span word="countries">countries</span>. <span word="In">In</span> <span word="less">less</span> <span word="than">than</span> 25 <span word="years">years</span>, <span word="the">the</span> <span word="country">country</span> <span word="will">will</span> <span word="have">have</span> <span word="to">to</span> <span word="add">add</span> <span word="almost">almost</span> <span word="as">as</span> <span word="much">much</span> <span word="infrastructure">infrastructure</span> <span word="as">as</span> <span word="it">it</span> <span word="has">has</span> <span word="already">already</span> <span word="built">built</span> <span word="up">up</span> <span word="to">to</span> <span word="now">now</span>, <span word="simply">simply</span> <span word="to">to</span> <span word="maintain">maintain</span> <span word="services">services</span> <span word="and">and</span> <span word="production">production</span> <span word="at">at</span> <span word="the">the</span> <span word="current">current</span> <span word="levels">levels</span>. <span word="This">This</span> <span word="will">will</span> <span word="be">be</span> <span word="a">a</span> <span word="tremendous">tremendous</span> <span word="challenge">challenge</span>, <span word="although">although</span> <span word="a">a</span> <span word="similar">similar</span> <span word="one">one</span> <span word="was">was</span> <span word="faced">faced</span> <span word="successfully">successfully</span> <span word="in">in</span> <span word="the">the</span> <span word="recent">recent</span> <span word="past">past</span>, <span word="when">when</span> <span word="available">available</span> <span word="infrastructure">infrastructure</span> <span word="was">was</span> <span word="doubled">doubled</span> <span word="in">in</span> <span word="two">two</span> <span word="decades">decades</span> <span word="or">or</span> <span word="so">so</span>. <span word="It">It</span> <span word="is">is</span> <span word="no">no</span> <span word="wonder">wonder</span> <span word="that">that</span> <span word="much">much</span> <span word="has">has</span> <span word="been">been</span> <span word="said">said</span> <span word="about">about</span> <span word="the">the</span> <span word="need">need</span> <span word="to">to</span> <span word="reduce">reduce</span> <span word="or">or</span> <span word="preferably">preferably</span> <span word="halt">halt</span> <span word="Mexicos">Mexicos</span> <span word="population">population</span> <span word="control">control</span> <span word="which">which</span> <span word="is">is</span> <span word="taken">taken</span> <span word="for">for</span> <span word="granted">granted</span> <span word="as">as</span> <span word="both">both</span> <span word="good">good</span> <span word="and">and</span> <span word="necessary">necessary</span>. <span word="It">It</span> <span word="has">has</span> <span word="also">also</span> <span word="gained">gained</span> <span word="supporters">supporters</span> <span word="in">in</span> <span word="the">the</span> <span word="developing">developing</span> <span word="world">world</span>, <span word="and">and</span> <span word="Mexico">Mexico</span> <span word="is">is</span> <span word="no">no</span> <span word="exception">exception</span>. <span word="But">But</span> <span word="the">the</span> <span word="arguments">arguments</span> <span word="about">about</span> <span word="population">population</span> <span word="are">are</span> <span word="complicated">complicated</span>, <span word="as">as</span> <span word="the">the</span> <span word="following">following</span> <span word="discussion">discussion</span> <span word="illustrates">illustrates</span>.</p><p> <span word="Even">Even</span> <span word="if">if</span> <span word="Mexicos">Mexicos</span> <span word="population">population</span> <span word="reaches">reaches</span> 125 <span word="million">million</span> <span word="by">by</span> <span word="the">the</span> <span word="year">year</span> 2010, <span word="its">its</span> <span word="population">population</span> <span word="density">density</span> <span word="is">is</span> <span word="still">still</span> <span word="smaller">smaller</span> <span word="than">than</span> <span word="the">the</span> 1985 <span word="population">population</span> <span word="density">density</span> <span word="of">of</span> <span word="some">some</span> 50 <span word="countries">countries</span>. <span word="By">By</span> <span word="international">international</span> <span word="standards">standards</span> <span word="Mexico">Mexico</span> <span word="will">will</span> <span word="still">still</span> <span word="not">not</span> <span word="be">be</span> <span word="overpopulated">overpopulated</span> <span word="by">by</span> <span word="the">the</span> <span word="year">year</span> 2010. <span word="If">If</span> <span word="wealth">wealth</span> <span word="is">is</span> <span word="generated">generated</span> <span word="by">by</span> <span word="people">people</span>, <span word="the">the</span> <span word="more">more</span> <span word="individuals">individuals</span> <span word="there">there</span> <span word="are">are</span>, <span word="the">the</span> <span word="greater">greater</span> <span word="the">the</span> <span word="wealth">wealth</span> <span word="that">that</span> <span word="potentially">potentially</span> <span word="could">could</span> <span word="be">be</span> <span word="generated">generated</span>. <span word="Why">Why</span> <span word="should">should</span> <span word="Mexico">Mexico</span> <span word="control">control</span> <span word="its">its</span> <span word="population">population</span> <span word="at">at</span> <span word="density">density</span> <span word="levels">levels</span> <span word="below">below</span> <span word="those">those</span> <span word="of">of</span> <span word="the">the</span> <span word="richer">richer</span> <span word="countries">countries</span> <span word="if">if</span> <span word="more">more</span> <span word="population">population</span> <span word="represents">represents</span> <span word="the">the</span> <span word="possibility">possibility</span> <span word="of">of</span> <span word="generating">generating</span> <span word="more">more</span> <span word="wealth">wealth</span>?</p>
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