2016年英语六级备考：阅读题之选词填空押题
<p><span word="In">In</span> <span word="a">a</span> <span word="recent">recent</span> <span word="paper">paper</span> <span word="in">in</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Science">Science</span>, <span word="Venter">Venter</span> <span word="and">and</span> <span word="his">his</span> <span word="colleagues">colleagues</span> ___1___ <span word="that">that</span> <span word="they">they</span> <span word="had">had</span> <span word="created">created</span> <span word="the">the</span> <span word="smallest">smallest</span> <span word="living">living</span> <span word="and">and</span> <span word="reproducing">reproducing</span> <span word="organism">organism</span>. <span word="Their">Their</span> <span word="creation">creation</span> <span word="is">is</span> <span word="a">a</span> <span word="simple">simple</span> <span word="cell">cell</span>, <span word="with">with</span> <span word="only">only</span> <span word="the">the</span> <span word="genes">genes</span> <span word="that">that</span> <span word="are">are</span> <span word="essential">essential</span> <span word="for">for</span> <span word="life">life</span>; <span word="it">it</span> <span word="is">is</span> <span word="larger">larger</span> <span word="only">only</span> <span word="than">than</span> <span word="those">those</span> <span word="found">found</span> <span word="in">in</span> <span word="viruses">viruses</span> <span word="and">and</span> <span word="other">other</span> <span word="entities">entities</span> <span word="that">that</span> <span word="rely">rely</span> <span word="on">on</span> <span word="hosts">hosts</span>(寄主) <span word="for">for</span> ___2___ <span word="functions">functions</span>.</p><p><span word="Venter">Venter</span> <span word="and">and</span> <span word="his">his</span> <span word="team">team</span> <span word="created">created</span> <span word="their">their</span> <span word="organism">organism</span> <span word="through">through</span> <span word="a">a</span> <span word="process">process</span> <span word="of">of</span> ___3___ <span word="and">and</span> <span word="error">error</span>. <span word="They">They</span> <span word="began">began</span> <span word="by">by</span> <span word="using">using</span> <span word="their">their</span> <span word="knowledge">knowledge</span> <span word="of">of</span> <span word="biology">biology</span> <span word="to">to</span> <span word="deduce">deduce</span> <span word="the">the</span> <span word="minimum">minimum</span> <span word="set">set</span> <span word="of">of</span> <span word="genes">genes</span> <span word="that">that</span> <span word="would">would</span> <span word="be">be</span> <span word="required">required</span> <span word="for">for</span> <span word="life">life</span>. <span word="However">However</span>, <span word="that">that</span> <span word="approach">approach</span> ___4___.</p><p><span word="The">The</span> <span word="most">most</span> <span word="important">important</span> <span word="result">result</span> <span word="of">of</span> <span word="the">the</span> <span word="Venter">Venter</span> <span word="team">team</span>'<span word="s">s</span> <span word="work">work</span> <span word="was">was</span> <span word="to">to</span> ___5___ <span word="how">how</span> <span word="little">little</span> <span word="we">we</span> <span word="know">know</span> <span word="about">about</span> <span word="the">the</span> <span word="basic">basic</span> <span word="biology">biology</span> <span word="of">of</span> <span word="life">life</span>. <span word="Most">Most</span> <span word="of">of</span> <span word="the">the</span> 473 <span word="genes">genes</span> <span word="take">take</span> <span word="care">care</span> <span word="of">of</span> <span word="housekeeping">housekeeping</span>: <span word="They">They</span> <span word="make">make</span> <span word="proteins">proteins</span>, <span word="keep">keep</span> <span word="DNA">DNA</span> <span word="in">in</span> <span word="good">good</span> <span word="repair">repair</span>, <span word="and">and</span> <span word="are">are</span> ___6___ <span word="for">for</span> <span word="the">the</span> <span word="cell">cell</span>'<span word="s">s</span> <span word="membrane">membrane</span> (薄膜) <span word="and">and</span> <span word="cytoplasm">cytoplasm</span> (细胞质). <span word="But">But</span> <span word="there">there</span> <span word="are">are</span> 149 <span word="genes">genes</span> <span word="whose">whose</span> <span word="function">function</span> <span word="is">is</span> <span word="unknown">unknown</span>. <span word="In">In</span> <span word="other">other</span> <span word="words">words</span>, <span word="the">the</span> <span word="purpose">purpose</span> <span word="of">of</span> <span word="nearly">nearly</span> <span word="one">one</span>-<span word="third">third</span> <span word="of">of</span> <span word="the">the</span> <span word="genes">genes</span>, <span word="which">which</span> <span word="needed">needed</span> <span word="to">to</span> <span word="keep">keep</span> <span word="the">the</span> <span word="organism">organism</span> ___7___, <span word="and">and</span> <span word="reproducing">reproducing</span> <span word="remains">remains</span> <span word="a">a</span> ___8___.</p><p><span word="Of">Of</span> <span word="the">the</span> 149 <span word="genes">genes</span> <span word="with">with</span> <span word="unknown">unknown</span> <span word="functions">functions</span>, 70 <span word="have">have</span> <span word="a">a</span> <span word="structure">structure</span> <span word="that">that</span> <span word="at">at</span> <span word="least">least</span> <span word="hints">hints</span> <span word="at">at</span> <span word="their">their</span> <span word="role">role</span> <span word="in">in</span> <span word="the">the</span> <span word="cell">cell</span>. <span word="But">But</span> <span word="we">we</span> <span word="know">know</span> <span word="nothing">nothing</span> <span word="about">about</span> <span word="the">the</span> <span word="other">other</span> 79, <span word="except">except</span> <span word="that">that</span> <span word="in">in</span> <span word="these">these</span> <span word="organisms">organisms</span>, <span word="in">in</span> <span word="this">this</span> <span word="environment">environment</span>, <span word="life">life</span> <span word="is">is</span> ___9___ <span word="without">without</span> <span word="them">them</span>.</p><p><span word="All">All</span> <span word="of">of</span> <span word="this">this</span> <span word="implies">implies</span> <span word="many">many</span> <span word="exciting">exciting</span> <span word="discoveries">discoveries</span> <span word="ahead">ahead</span>. <span word="And">And</span> <span word="yet">yet</span>, <span word="when">when</span> <span word="it">it</span> <span word="comes">comes</span> <span word="to">to</span> <span word="practical">practical</span>, <span word="commercial">commercial</span> <span word="objectives">objectives</span>, <span word="the">the</span> <span word="news">news</span> <span word="is">is</span> ___10___ <span word="more">more</span> <span word="sobering">sobering</span>.</p>
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