六级冲刺练习：阅读（132）
<p> <span word="Although">Although</span> <span word="given">given</span> <span word="less">less</span> <span word="publicity">publicity</span>, <span word="the">the</span> <span word="agricultural">agricultural</span> <span word="damage">damage</span> <span word="done">done</span> <span word="by">by</span> <span word="the">the</span> <span word="many">many</span> <span word="smaller">smaller</span>, <span word="more">more</span> <span word="frequent">frequent</span> <span word="floods">floods</span> <span word="usually">usually</span> <span word="far">far</span> <span word="exceeds">exceeds</span> <span word="the">the</span> <span word="losses">losses</span> <span word="caused">caused</span> <span word="by">by</span> <span word="the">the</span> <span word="very">very</span> <span word="grand">grand</span> <span word="ones">ones</span>. <span word="In">In</span> <span word="the">the</span> <span word="Central">Central</span> <span word="States">States</span>, <span word="ditches">ditches</span> <span word="and">and</span> <span word="drains">drains</span> <span word="cause">cause</span> <span word="the">the</span> <span word="flows">flows</span> <span word="from">from</span> <span word="spring">spring</span> <span word="rains">rains</span> <span word="and">and</span> <span word="melting">melting</span> <span word="snow">snow</span> <span word="to">to</span> <span word="run">run</span> <span word="far">far</span> <span word="more">more</span> <span word="rapidly">rapidly</span> <span word="than">than</span> <span word="in">in</span> <span word="the">the</span> <span word="days">days</span> <span word="before">before</span> <span word="white">white</span> <span word="men">men</span> <span word="settled">settled</span> <span word="on">on</span> <span word="the">the</span> <span word="land">land</span>. <span word="Once">Once</span>, <span word="excess">excess</span> <span word="spring">spring</span> <span word="flood">flood</span> <span word="waters">waters</span> <span word="emptied">emptied</span> <span word="into">into</span> <span word="lakes">lakes</span> <span word="and">and</span> <span word="swampy">swampy</span> <span word="lands">lands</span>, <span word="there">there</span> <span word="to">to</span> <span word="be">be</span> <span word="detained">detained</span> <span word="for">for</span> <span word="slow">slow</span> <span word="release">release</span> <span word="into">into</span> <span word="stream">stream</span> <span word="and">and</span> <span word="rivers">rivers</span>. <span word="Now">Now</span>, <span word="systematic">systematic</span> <span word="drainage">drainage</span> <span word="has">has</span> <span word="actually">actually</span> <span word="eliminated">eliminated</span> <span word="these">these</span> <span word="natural">natural</span> <span word="reservoirs">reservoirs</span>.</p><p> <span word="In">In</span> <span word="the">the</span> <span word="more">more</span> <span word="rolling">rolling</span> <span word="sections">sections</span> <span word="of">of</span> <span word="the">the</span> <span word="East">East</span>, <span word="spring">spring</span> <span word="runoff">runoff</span> <span word="was">was</span> <span word="formerly">formerly</span> <span word="absorbed">absorbed</span> <span word="and">and</span> <span word="held">held</span> <span word="temporarily">temporarily</span> <span word="in">in</span> <span word="the">the</span> <span word="porous">porous</span> <span word="soils">soils</span> <span word="beneath">beneath</span> <span word="the">the</span> <span word="unbroken">unbroken</span> <span word="expanse">expanse</span> <span word="of">of</span> <span word="forest">forest</span>. <span word="When">When</span> <span word="large">large</span> <span word="areas">areas</span> <span word="were">were</span> <span word="converted">converted</span> <span word="to">to</span> <span word="farm">farm</span> <span word="use">use</span>, <span word="removal">removal</span> <span word="of">of</span> <span word="the">the</span> <span word="forest">forest</span> <span word="and">and</span> <span word="the">the</span> <span word="practice">practice</span> <span word="of">of</span> <span word="up">up</span>-<span word="and">and</span>-<span word="down">down</span> <span word="hill">hill</span> <span word="plowing">plowing</span> <span word="deprived">deprived</span> <span word="the">the</span> <span word="soils">soils</span> <span word="of">of</span> <span word="much">much</span> <span word="of">of</span> <span word="their">their</span> <span word="ability">ability</span> <span word="to">to</span> <span word="catch">catch</span> <span word="and">and</span> <span word="store">store</span> <span word="water">water</span>.</p><p> <span word="The">The</span> <span word="effects">effects</span> <span word="of">of</span> <span word="eliminating">eliminating</span> <span word="the">the</span> <span word="natural">natural</span> <span word="forest">forest</span> <span word="cover">cover</span> <span word="are">are</span> <span word="shown">shown</span> <span word="in">in</span> <span word="the">the</span> <span word="gullied">gullied</span> <span word="farm">farm</span> <span word="lands">lands</span> <span word="and">and</span> <span word="widened">widened</span> <span word="stream">stream</span> <span word="channels">channels</span> <span word="found">found</span> <span word="in">in</span> <span word="some">some</span> <span word="densely">densely</span> <span word="settled">settled</span> <span word="areas">areas</span>. <span word="Partly">Partly</span> <span word="because">because</span> <span word="the">the</span> <span word="stream">stream</span> <span word="channels">channels</span> <span word="are">are</span> <span word="more">more</span> <span word="or">or</span> <span word="less">less</span> <span word="filled">filled</span> <span word="with">with</span> <span word="material">material</span> <span word="washed">washed</span> <span word="down">down</span> <span word="from">from</span> <span word="the">the</span> <span word="uplands">uplands</span>, <span word="and">and</span> <span word="partly">partly</span> <span word="because">because</span> <span word="storm">storm</span> <span word="runoff">runoff</span> <span word="has">has</span> <span word="increased">increased</span>, <span word="the">the</span> <span word="channels">channels</span> <span word="are">are</span> <span word="today">today</span> <span word="no">no</span> <span word="longer">longer</span> <span word="able">able</span> <span word="to">to</span> <span word="carry">carry</span> <span word="all">all</span> <span word="the">the</span> <span word="flow">flow</span> <span word="from">from</span> <span word="heavy">heavy</span> <span word="rains">rains</span>. <span word="This">This</span> <span word="explains">explains</span> <span word="why">why</span> <span word="the">the</span> <span word="streams">streams</span> <span word="overtop">overtop</span> <span word="banks">banks</span> <span word="far">far</span> <span word="more">more</span> <span word="often">often</span> <span word="than">than</span> <span word="in">in</span> <span word="the">the</span> <span word="days">days</span> <span word="before">before</span> <span word="settlement">settlement</span>.</p><p> 26. <span word="The">The</span> <span word="best">best</span> <span word="title">title</span> <span word="for">for</span> <span word="the">the</span> <span word="selection">selection</span> <span word="would">would</span> <span word="be">be</span>______.</p>
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