2017届高考英语一轮复习分层限时跟踪练：必修3-Unit 4《Astronomy the science of the stars》（人教版新课标含解析）
<p> 分层限时跟踪练</p><p> Ⅰ.单句语法填空</p><p> 1．<span word="I">I</span> <span word="am">am</span> <span word="puzzled">puzzled</span>(<span word="puzzle">puzzle</span>)<span word="by">by</span> <span word="his">his</span> <span word="failure">failure</span> <span word="to">to</span> <span word="reply">reply</span> <span word="that">that</span> <span word="he">he</span> <span word="hasn">hasn</span>'<span word="t">t</span> <span word="replied">replied</span> <span word="to">to</span> <span word="my">my</span> <span word="letter">letter</span>.</p><p> 2．<span word="It">It</span> <span word="was">was</span> <span word="said">said</span> <span word="that">that</span> <span word="this">this</span> <span word="was">was</span> <span word="the">the</span> <span word="only">only</span> <span word="copy">copy</span> <span word="of">of</span> <span word="the">the</span> <span word="book">book</span> <span word="in">in</span> <span word="existence">existence</span>(<span word="exist">exist</span>)．</p><p> 3．<span word="As">As</span> <span word="we">we</span> <span word="all">all</span> <span word="know">know</span>，<span word="a">a</span> <span word="bad">bad</span> <span word="eating">eating</span> <span word="habit">habit</span> <span word="is">is</span> <span word="harmful">harmful</span>(<span word="harm">harm</span>) <span word="to">to</span> <span word="one">one</span>'<span word="s">s</span> <span word="health">health</span>.</p><p> 4．<span word="Unlike">Unlike</span>(<span word="like">like</span>)<span word="what">what</span> <span word="he">he</span> <span word="said">said</span>，<span word="he">he</span> <span word="didn">didn</span>'<span word="t">t</span> <span word="carry">carry</span> <span word="out">out</span> <span word="his">his</span> <span word="promise">promise</span>.</p><p> 5．<span word="As">As</span> <span word="the">the</span> <span word="old">old</span> <span word="saying">saying</span> <span word="goes">goes</span>，<span word="it">it</span> <span word="is">is</span> <span word="easier">easier</span> <span word="to">to</span>_<span word="pull">pull</span>(<span word="pull">pull</span>) <span word="down">down</span> <span word="than">than</span> <span word="to">to</span> <span word="build">build</span> <span word="up">up</span>.</p><p> 6．<span word="Give">Give</span> <span word="Mary">Mary</span> <span word="a">a</span> <span word="call">call</span>；<span word="she">she</span> <span word="needs">needs</span> <span word="cheering">cheering</span> <span word="up">up</span>.</p><p> 7．<span word="I">I</span> <span word="was">was</span> <span word="warned">warned</span> <span word="to">to</span> <span word="watch">watch</span> <span word="out">out</span> <span word="for">for</span> <span word="the">the</span> <span word="terrifying">terrifying</span> <span word="dog">dog</span>.</p><p> 8．<span word="Last">Last</span> <span word="night">night</span> <span word="a">a</span> <span word="fire">fire</span> <span word="broke">broke</span> <span word="out">out</span> <span word="in">in</span> <span word="the">the</span> <span word="hotel">hotel</span> <span word="across">across</span> <span word="the">the</span> <span word="street">street</span>.</p><p> 9．<span word="Last">Last</span> <span word="night">night</span>，<span word="Mrs">Mrs</span>.<span word="Green">Green</span> <span word="had">had</span> <span word="a">a</span> <span word="heart">heart</span> <span word="attack">attack</span>.<span word="But">But</span> <span word="luckily">luckily</span>，<span word="the">the</span> <span word="doctor">doctor</span> <span word="came">came</span> <span word="in">in</span> <span word="time">time</span> <span word="to">to</span> <span word="save">save</span> <span word="her">her</span> <span word="life">life</span>.</p><p> 10．<span word="Class">Class</span> <span word="Three">Three</span> <span word="should">should</span> <span word="be">be</span> <span word="responsible">responsible</span> <span word="for">for</span> <span word="raising">raising</span> <span word="the">the</span> <span word="red">red</span> <span word="flag">flag</span> <span word="this">this</span> <span word="week">week</span> <span word="in">in</span> <span word="its">its</span> <span word="turn">turn</span>.</p><p> Ⅱ.完成句子</p><p> 1．如今，违反交通规则和乱扔垃圾的现象很常见，对生活和环境造成了严重的破坏。</p><p> <span word="These">These</span> <span word="days">days</span>，<span word="breaking">breaking</span> <span word="traffic">traffic</span> <span word="rules">rules</span> <span word="and">and</span> <span word="littering">littering</span> <span word="are">are</span> <span word="not">not</span> <span word="uncommon">uncommon</span>，<span word="causing">causing</span>_<span word="serious">serious</span>_<span word="harm">harm</span>_<span word="to">to</span>_<span word="life">life</span>_<span word="and">and</span>_<span word="the">the</span>_<span word="environment">environment</span>.</p><p> 2．很久以前地球上存在着体形庞大的动物。</p><p> <span word="There">There</span>_<span word="existed">existed</span>_<span word="huge">huge</span>_<span word="animals">animals</span>_<span word="on">on</span> <span word="the">the</span> <span word="earth">earth</span> <span word="a">a</span> <span word="long">long</span> <span word="time">time</span> <span word="ago">ago</span>.</p><p> 3．她脸上迷惑的表情表明她不明白我说的话。</p>
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