英语六级考试冲刺练习阅读篇79
<p> <span word="For">For</span> <span word="as">as</span> <span word="long">long</span> <span word="as">as</span> <span word="humans">humans</span> <span word="have">have</span> <span word="raised">raised</span> <span word="crops">crops</span> <span word="as">as</span> <span word="a">a</span> <span word="source">source</span> <span word="of">of</span> <span word="food">food</span> <span word="and">and</span> <span word="other">other</span> <span word="products">products</span>, <span word="insects">insects</span> <span word="have">have</span> <span word="damaged">damaged</span> <span word="them">them</span>. <span word="Between">Between</span> 1870 <span word="and">and</span> 1880, <span word="locusts">locusts</span> <span word="ate">ate</span> <span word="millions">millions</span> <span word="of">of</span> <span word="dollars">dollars</span> <span word="worth">worth</span> <span word="of">of</span> <span word="crops">crops</span> <span word="in">in</span> <span word="the">the</span> <span word="Mississippi">Mississippi</span> <span word="Valley">Valley</span>. <span word="Today">Today</span> <span word="in">in</span> <span word="the">the</span> <span word="United">United</span> <span word="States">States</span> <span word="the">the</span> <span word="cotton">cotton</span> <span word="boll">boll</span> <span word="weevil">weevil</span> <span word="damages">damages</span> <span word="about">about</span> 300 <span word="million">million</span> <span word="dollars">dollars</span> <span word="worth">worth</span> <span word="of">of</span> <span word="crops">crops</span> <span word="each">each</span> <span word="year">year</span>. <span word="Additional">Additional</span> <span word="millions">millions</span> <span word="are">are</span> <span word="lost">lost</span> <span word="each">each</span> <span word="year">year</span> <span word="to">to</span> <span word="the">the</span> <span word="appetites">appetites</span> <span word="of">of</span> <span word="other">other</span> <span word="plant">plant</span>-<span word="eating">eating</span> <span word="insects">insects</span>. <span word="Some">Some</span> <span word="of">of</span> <span word="these">these</span> <span word="are">are</span> <span word="corn">corn</span> <span word="borers">borers</span>, <span word="gypsy">gypsy</span> <span word="moths">moths</span>, <span word="potato">potato</span> <span word="beetles">beetles</span>, <span word="and">and</span> <span word="Japanese">Japanese</span> <span word="beetles">beetles</span>. <span word="In">In</span> <span word="modern">modern</span> <span word="times">times</span>, <span word="many">many</span> <span word="powerful">powerful</span> <span word="insecticides">insecticides</span> <span word="have">have</span> <span word="been">been</span> <span word="used">used</span> <span word="in">in</span> <span word="an">an</span> <span word="attempt">attempt</span> <span word="to">to</span> <span word="destroy">destroy</span> <span word="insects">insects</span> <span word="that">that</span> <span word="damage">damage</span> <span word="crops">crops</span> <span word="and">and</span> <span word="trees">trees</span>. <span word="Some">Some</span> <span word="kinds">kinds</span> <span word="of">of</span> <span word="insecticides">insecticides</span>, <span word="when">when</span> <span word="carefully">carefully</span> <span word="used">used</span>, <span word="have">have</span> <span word="worked">worked</span> <span word="well">well</span>. <span word="Yet">Yet</span> <span word="the">the</span> <span word="same">same</span> <span word="insecticides">insecticides</span> <span word="have">have</span> <span word="caused">caused</span> <span word="some">some</span> <span word="unexpected">unexpected</span> <span word="problems">problems</span>. <span word="In">In</span> <span word="one">one</span> <span word="large">large</span> <span word="area">area</span>, <span word="an">an</span> <span word="insecticide">insecticide</span> <span word="was">was</span> <span word="used">used</span> <span word="against">against</span> <span word="Japanese">Japanese</span> <span word="beetles">beetles</span>, <span word="which">which</span> <span word="eat">eat</span> <span word="almost">almost</span> <span word="any">any</span> <span word="kind">kind</span> <span word="of">of</span> <span word="flower">flower</span> <span word="or">or</span> <span word="leaf">leaf</span>. <span word="Shortly">Shortly</span> <span word="afterward">afterward</span>, <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="corn">corn</span> <span word="borers">borers</span> <span word="almost">almost</span> <span word="doubled">doubled</span>. <span word="As">As</span> <span word="intended">intended</span>, <span word="the">the</span> <span word="insecticide">insecticide</span> <span word="had">had</span> <span word="killed">killed</span> <span word="many">many</span> <span word="Japanese">Japanese</span> <span word="beetles">beetles</span>. <span word="But">But</span> <span word="it">it</span> <span word="had">had</span> <span word="killed">killed</span> <span word="many">many</span> <span word="of">of</span> <span word="the">the</span> <span word="insect">insect</span> <span word="enemies">enemies</span> <span word="of">of</span> <span word="the">the</span> <span word="corn">corn</span> <span word="borer">borer</span> <span word="as">as</span> <span word="well">well</span>. <span word="In">In</span> <span word="another">another</span> <span word="case">case</span>, <span word="an">an</span> <span word="insecticide">insecticide</span> <span word="was">was</span> <span word="used">used</span> <span word="in">in</span> <span word="Louisiana">Louisiana</span> <span word="to">to</span> <span word="kill">kill</span> <span word="the">the</span> <span word="troublesome">troublesome</span> <span word="fire">fire</span> <span word="ant">ant</span>. <span word="The">The</span> <span word="insecticide">insecticide</span> <span word="did">did</span> <span word="not">not</span> <span word="kill">kill</span> <span word="many">many</span> <span word="fire">fire</span> <span word="ants">ants</span>. <span word="It">It</span> <span word="did">did</span> <span word="kill">kill</span> <span word="several">several</span> <span word="small">small</span> <span word="animals">animals</span>. <span word="It">It</span> <span word="also">also</span> <span word="killed">killed</span> <span word="some">some</span> <span word="insect">insect</span> <span word="enemies">enemies</span> <span word="of">of</span> <span word="the">the</span> <span word="sugarcane">sugarcane</span> <span word="borer">borer</span>, <span word="a">a</span> <span word="much">much</span> <span word="more">more</span> <span word="destructive">destructive</span> <span word="pest">pest</span> <span word="than">than</span> <span word="the">the</span> <span word="fire">fire</span> <span word="ants">ants</span>. <span word="As">As</span> <span word="a">a</span> <span word="result">result</span>, <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="sugarcane">sugarcane</span> <span word="borers">borers</span> <span word="increased">increased</span> <span word="and">and</span> <span word="severely">severely</span> <span word="damaged">damaged</span> <span word="the">the</span> <span word="sugarcane">sugarcane</span> <span word="crop">crop</span>. <span word="To">To</span> <span word="be">be</span> <span word="sure">sure</span> <span word="that">that</span> <span word="one">one</span> <span word="insect">insect</span> <span word="pest">pest</span> <span word="will">will</span> <span word="not">not</span> <span word="be">be</span> <span word="traded">traded</span> <span word="for">for</span> <span word="another">another</span> <span word="when">when</span> <span word="an">an</span> <span word="insecticide">insecticide</span> <span word="is">is</span> <span word="used">used</span>, <span word="scientists">scientists</span> <span word="must">must</span> <span word="perform">perform</span> <span word="careful">careful</span> <span word="experiments">experiments</span> <span word="and">and</span> <span word="do">do</span> <span word="wide">wide</span> <span word="research">research</span>. <span word="The">The</span> <span word="experiments">experiments</span> <span word="and">and</span> <span word="research">research</span> <span word="provide">provide</span> <span word="knowledge">knowledge</span> <span word="of">of</span> <span word="the">the</span> <span word="possible">possible</span> <span word="hazards">hazards</span> <span word="an">an</span> <span word="insecticide">insecticide</span> <span word="may">may</span> <span word="bring">bring</span> <span word="to">to</span> <span word="plant">plant</span> <span word="and">and</span> <span word="animal">animal</span> <span word="communities">communities</span>. <span word="Without">Without</span> <span word="such">such</span> <span word="knowledge">knowledge</span>, <span word="we">we</span> <span word="have">have</span> <span word="found">found</span> <span word="that">that</span> <span word="nature">nature</span> <span word="sometimes">sometimes</span> <span word="responds">responds</span> <span word="to">to</span> <span word="insecticides">insecticides</span> <span word="in">in</span> <span word="unexpected">unexpected</span> <span word="ways">ways</span>. 21. <span word="An">An</span> <span word="insecticide">insecticide</span> <span word="was">was</span> <span word="used">used</span> <span word="in">in</span> <span word="Louisiana">Louisiana</span> <span word="to">to</span> <span word="kill">kill</span> <span word="the">the</span> <span word="troublesome">troublesome</span>______. <span word="A">A</span>. <span word="corn">corn</span> <span word="borer">borer</span> <span word="B">B</span>. <span word="Japanese">Japanese</span> <span word="beetle">beetle</span> <span word="B">B</span>. <span word="gypsy">gypsy</span> <span word="moth">moth</span> <span word="D">D</span>. <span word="fire">fire</span> <span word="ant">ant</span> 22. <span word="While">While</span> <span word="it">it</span> <span word="is">is</span> <span word="not">not</span> <span word="directly">directly</span> <span word="stated">stated</span>, <span word="the">the</span> <span word="article">article</span> <span word="suggests">suggests</span> <span word="that">that</span>______. <span word="A">A</span>. <span word="insecticides">insecticides</span> <span word="are">are</span> <span word="not">not</span> <span word="dangerous">dangerous</span> <span word="to">to</span> <span word="any">any</span> <span word="small">small</span> <span word="animalsB">animalsB</span>. <span word="insecticides">insecticides</span> <span word="do">do</span> <span word="not">not</span> <span word="always">always</span> <span word="accomplish">accomplish</span> <span word="their">their</span> <span word="purposesC">purposesC</span>. <span word="insecticides">insecticides</span> <span word="are">are</span> <span word="no">no</span> <span word="longer">longer</span> <span word="being">being</span> <span word="used">used</span> <span word="to">to</span> <span word="kill">kill</span> <span word="insectsD">insectsD</span>. <span word="insecticides">insecticides</span> <span word="do">do</span> <span word="no">no</span> <span word="harm">harm</span> <span word="to">to</span> <span word="people">people</span> 23. <span word="On">On</span> <span word="the">the</span> <span word="whole">whole</span>, <span word="the">the</span> <span word="article">article</span> <span word="tells">tells</span> <span word="about">about</span>______. <span word="A">A</span>. <span word="the">the</span> <span word="appetites">appetites</span> <span word="of">of</span> <span word="plant">plant</span>-<span word="eating">eating</span> <span word="insects">insects</span> <span word="B">B</span>. <span word="the">the</span> <span word="best">best</span> <span word="way">way</span> <span word="to">to</span> <span word="kill">kill</span> <span word="boll">boll</span> <span word="weevils">weevils</span> <span word="C">C</span>. <span word="the">the</span> <span word="dangers">dangers</span> <span word="in">in</span> <span word="using">using</span> <span word="insecticides">insecticides</span> <span word="D">D</span>. <span word="the">the</span> <span word="best">best</span> <span word="way">way</span> <span word="to">to</span> <span word="grow">grow</span> <span word="crops">crops</span>24. <span word="Which">Which</span> <span word="statement">statement</span> <span word="does">does</span> <span word="this">this</span> <span word="article">article</span> <span word="lead">lead</span> <span word="you">you</span> <span word="to">to</span> <span word="believe">believe</span>? <span word="A">A</span>. <span word="All">All</span> <span word="changes">changes</span> <span word="are">are</span> <span word="predictable">predictable</span>. <span word="B">B</span>. <span word="Nothing">Nothing</span> <span word="ever">ever</span> <span word="changes">changes</span> <span word="in">in</span> <span word="nature">nature</span>. <span word="C">C</span>. <span word="Nature">Nature</span> <span word="is">is</span> <span word="not">not</span> <span word="always">always</span> <span word="predictable">predictable</span>. <span word="D">D</span>. <span word="Nature">Nature</span> <span word="always">always</span> <span word="serves">serves</span> <span word="man">man</span> <span word="well">well</span>. 25. <span word="Scientists">Scientists</span> <span word="perform">perform</span> <span word="careful">careful</span> <span word="experiments">experiments</span> <span word="and">and</span> <span word="do">do</span> <span word="wide">wide</span> <span word="research">research</span> <span word="because">because</span>______. <span word="A">A</span>. <span word="they">they</span> <span word="must">must</span> <span word="learn">learn</span> <span word="to">to</span> <span word="destroy">destroy</span> <span word="all">all</span> <span word="the">the</span> <span word="insects">insects</span> <span word="that">that</span> <span word="we">we</span> <span word="needB">needB</span>. <span word="they">they</span> <span word="must">must</span> <span word="be">be</span> <span word="sure">sure</span> <span word="one">one</span> <span word="insect">insect</span> <span word="pest">pest</span> <span word="is">is</span> <span word="not">not</span> <span word="traded">traded</span> <span word="for">for</span> <span word="anotherC">anotherC</span>. <span word="research">research</span> <span word="keeps">keeps</span> <span word="them">them</span> <span word="from">from</span> <span word="inventing">inventing</span> <span word="new">new</span> <span word="insecticide">insecticide</span> <span word="for">for</span> <span word="the">the</span> <span word="cropsD">cropsD</span>. <span word="research">research</span> <span word="helps">helps</span> <span word="them">them</span> <span word="find">find</span> <span word="a">a</span> <span word="way">way</span> <span word="to">to</span> <span word="kill">kill</span> <span word="all">all</span> <span word="insects">insects</span>21. <span word="D">D</span> 22. <span word="B">B</span> 23. <span word="C">C</span> 24. <span word="C">C</span> 25. <span word="B">B</span></p>
页:
[1]