MostofthesandstormsthathadsweptChinalastyearoriginatedfromforeignland，aChineseofficialinchargeofdesertificationcontrolsaidMonday.Andtheinvasions(入侵)couldpartlyexplainthefrequentsandstormsinthecountryinrecentyearsdespiteitsachievementsindesertificationcontrol.Sincethestartoflastspring，thenorthandnorthwesternChineseregionshadbeenhitby17sandstorms，ofwhich，adozencamefromforeignland.Situatedinthecentral-Asiasandstormregion，oneoftheworld’sfourlargestsandstormsources，ChinaalsosuffersfromsandstormsfromoutsidethecountrywhilebeingblamedasasandsourcetonortheastAsia.TheotherthreemajorsourcesareinAfrica，NorthAmericaandAustralia.Thelandsufferingfromdesertificationhasbeendecreasingby7,585sq.kmannuallyinChina，andtheareaofsandylandhasalsobeenfallingby1,284sq.kmayear.Theshrinkage(收縮)formsaclearcontrasttothefactthatthelandsufferingfromdesertificationandsandyfeaturewasaddedby10,400sq.kmand3,436sq.kmlatelastcentury，respectively.Currently，thedesertificationlandinChinamakesup2.64millionsq.km，accountingfor27.46percentofthenation’sland，anditssandylandtotals1.74millionsq.km，accountingfor18.1percentofthecountry’stotal.根據(jù)上文完成下列各題1.WheredomostofthesandstormsinChinaefrom?2.Whatdoestheunderlinedword“decreasing”meaninParagraph4?3.WhichisbelievedtobethesandsourcetonortheastAsia?PeriodOneIntroduction&ReadingandVocabularyⅠ.重點單詞1.adj.嚇人的；可怕的vt.使驚嚇2.adj.內(nèi)陸的；內(nèi)地的n.陸地3.n.進程；過程4.n.公民，市民5.n.沙塵；灰塵6.n.力量；力氣adj.強健的，強壯的Ⅱ.重點短語1.砍倒2.挖3.突然遭遇(風暴等)4.由于，因為，作為……的結果5.一個接一個地Ⅲ.重點句式1.so...that...Theyareoftenthickyoucannotseethesun，andthewindissometimesstrongenoughtomovesanddunes.沙塵暴常常很大，以至于遮住了太陽，有時風力大得足以移動沙丘。2.不定式作主語“wasaterribleexperience，”hesaid.他說：“遇上沙塵暴是一種可怕的經(jīng)歷?！?.make＋it＋adj.＋todoThestormssometimescontinuealldayandtrafficmovesveryslowlybecausethethickdustmakesitdifficult(see).Ⅰ.閱讀課文，匹配段落大意1.Para.1A.Thedescriptionofstrongsandstorms.2.Para.2B.TheeffectsofsandstormsonBeijing.3.Para.3C.ThemeasurestopreventsandstormsingtoBeijing.4.Para.4D.Sandstorms，Asianmajordisaster.5.Para.5E.Whattodoinasandstorm.6.Para.6F.NorthwestChina，asandstormcenter.Ⅱ.課文判斷正(T)誤(F)1.Sandstormsarestrong，wetwindsthatcarrysand.()2.Sandstormsefromthedesertareas.()3.Thelandbeesdesertmainlybecauseofclimatechanges.()4.SandstormsinChinaseemtohaveincreasedinrecentyears.()5.SandstormsusuallycontinueseveralmonthsinBeijing.()Ⅲ.課文閱讀理解1.Whatisthebestdescriptionaboutasandstormaccordingtothetext?A.IthasbeenamajordisasterformanyAsiancountriesforcenturies.B.Itisstrongwindcarryingsand.C.Itisawaytocauselandtobeedesert.D.Itisakindofnaturaldisasterthatcan’tbetreated.2.WhatisthemainreasonfortheincreaseofsandstormsinChinarecently?A.Tobeclosetomanydeserts.B.TheworseningoftheweatherinChina.C.Desertification.D.Cuttingdowntreesanddiggingupgrass.3.Whateffectsaresandstormsbringingtopeoplelivingincities?A.Thewholecityisusuallycoveredinathickandbrown-yellowdust.B.Trafficmovesveryslowly.C.Peoplecan’tbreathewellandthedustmakesthemill.D.Alloftheabove.4.Whatisthebestwaytoavoidtheeffectsfromthesandstorm?A.Tolivefarawayfromdeserts.B.Tostayathomewhenasandstormhappens.C.Towearamaskifyouwanttogoout.D.Toplantmoretrees.5.WhichofthefollowingisNOTtheelementtomakeCentralAsia，NorthAmerica，CentralAfricaandAustraliathefourmainplaceswheretherearesandstorms?A.Theclimateintheseplacesisratherbad.B.Theyarealltheplaceswithbigdeserts.C.Thenaturalenvironmentintheseplacesisworseningeveryyear.D.Thegovernmentsintheseplacespaylittleattentiontotheprotectionofnature.重點詞匯1.Itlastedfortenhoursandwasveryfrightening.它(這場沙塵暴)持續(xù)了十個小時，非常可怕。[歸納拓展](1)frighteningadj.令人害怕的，嚇人的(2)frightenedadj.害怕的befrightenedof/at/that...害怕……befrightenedtodosth.害怕去做某事(3)frightenvt.使害怕frightensb.away嚇走某人frightensb.todeath把某人嚇得要死frightenodoingsth.恐嚇某人做某事frightensb.outofdoingsth.恐嚇某人使其不敢做某事[語境助記](1)Asuddenstopcanbeaveryfrighteningexperience，especiallyifyouaretravellingathighspeed.(2016·浙江)突然停下來可能是一次非?？膳碌慕?jīng)歷，尤其是你正在高速行駛時。(2)Theboywasfrightenedtospeak.那孩子嚇得不敢說話。(3)Theyfrightenedtheoldladyintosigningthepaper.他們恐嚇那位老太太簽了字據(jù)。[題組訓練](1)用frighten的正確形式填空①Thegirlwasbythedog.②Onseeingtheman’sface，allareaway.(2)單句改錯Ihadafrightenedencounter(遭遇)withapoisonoussnake.2.Desertsarealsocreatedbecausepeoplecutdowntreesanddigupgrass.人們砍樹挖草也造成了土壤的沙化。[歸納拓展]cutdown砍倒；殺死；削減；縮小(尺寸、數(shù)量等)cutout剪除；切掉，割掉；停止；放棄cutup切碎；使傷心cutoff切斷；停掉；隔絕cutin插入；插嘴cutacross/through抄近路穿過[語境助記](1)Don’tcutdownthetreethatgivesyoushade.不要忘恩負義。(2)JohnwascutupabouthisfailuretowinMary’sheart.約翰沒有贏得瑪麗的芳心，感到十分傷心。(3)Asweweretalking，shecutinwithaquestionwhetherwecouldcutacrossthesquare.我們正在談話，她插嘴問我們是否可以抄近路穿過廣場。[題組訓練](1)寫出下列句子中cutdown的漢語意思①Thesepeopledonothaveequipmenttocutdownthetrees.②Thewhistlingbulletscuttheenemysoldiersdownlikecorn.③Mymothercutdownfather’strouserstofitme.④MayIsuggestthatyoucutdownthequantityofyourorderbyhalf？(2)用適當?shù)慕椤⒏痹~填空①Thefloodcuttheirsupplies.②Halvethetomatoesandthencutthem.③IwasjusttalkingtoMarywhenDavecut.④Howcanyoucuttheriskofcancer?⑤Youcancuttheunimportantdetails.3.ScientistshavetriedmanywaystosolvethisproblemandinChina，amasscampaignhasbeenstartedtohelpsolveit.科學家們嘗試了許多方法來解決這個問題，在中國，也發(fā)動了群眾來對付沙塵暴。[歸納拓展]massadj.大量的；大規(guī)模的，廣泛的；n.團，塊，堆；大量，許多；vt.&vi.集結；聚集massproduction批量生產(chǎn)themasses群眾massesof＝amassof許多，大量(可用來修飾可數(shù)名詞，也可用來修飾不可數(shù)名詞。作主語時，amassof謂語動詞的單復數(shù)與其后的名詞保持一致；massesof謂語動詞的單復數(shù)與masses保持一致。)[語境助記](1)Theirlatestproduceisaimedatthemassmarket.他們的最新農(nóng)產(chǎn)品瞄準了大眾市場。(2)Hisheartislinkedwiththeheartsofthemasses.他和群眾心連心。(3)Thereweremassesofcloudsinthesky.天上有大塊大塊的云團。[題組訓練](1)用mass或其短語的正確形式填空①Themovementwasacampaignwhichwasorganizedbygovernment.②arethetruemakersofhistory.(2)單句改錯Sofar，amassofbookshasbeenhandedout.思考許多短語都有“許多的，大量的”之意，可修飾可數(shù)或不可數(shù)名詞。你能列舉一些嗎？eq\b\lc\\rc\}(\a\vs4\al\co1(,))＋可數(shù)或不可數(shù)名詞eq\b\lc\\rc\}(\a\vs4\al\co1(,,))＋可數(shù)名詞復數(shù)eq\b\lc\\rc\}(\a\vs4\al\co1(,))＋不可數(shù)名詞4.“Tohavebeencaughtinasandstormwasaterribleexperience，”hesaid.他說：“遇上沙塵暴是一種可怕的經(jīng)歷?！盵歸納拓展]becaughtin(＝betrappedin＝bestuckin)遭遇上catch構成的常見短語：catchupwith趕上catchholdof抓住，握住catchsightof看見catchsb.doingsth.發(fā)覺/發(fā)現(xiàn)某人正在做某事[語境助記](1)Thankfully，Iwasnotcaughtintheterrifyingthunderstorm.謝天謝地，我沒有遭遇那場駭人的雷暴。(2)You’llhavetoworkhardertocatchupwiththetopstudents.你必須更加努力地學習，才能趕上優(yōu)秀的學生。(3)Theteachercaughthimsleepinginclass.老師逮住他在課堂上睡覺。[題組訓練](1)用catch短語的正確形式填空①Ioftenaheavytrafficonmywaytoschool.②Atthemomentourtechnologyismoreadvanced，butothercountriesareus.③Thechildhismother’shandtightlyintheearthquake.④Sheacarinthedistance，butIsawnothing.(2)單句改錯Ifacookiscaughtsmokeinthekitchen，hewillbefiredimmediately.5....，butthestrengthofthestormsometimessurprisespeople.……，但是沙塵暴的威力有時讓人意外。[歸納拓展](1)strengthn.[U]力量；力氣；意志力；堅強；[C]強項，優(yōu)勢，長處havethestrengthtodosth.有做某事的力氣/意志力buildupone’sstrength增強體力withallone’sstrength用盡全身的力氣strengthsandweaknesses強項和弱項；優(yōu)缺點(2)strengthenv.加強，鞏固(3)strongadj.強健的，強壯的[語境助記](1)Hehasbeendoingmorningexercisetobuilduphisstrength.他一直進行晨練以增強體力。(2)Everyonehashisorherstrengthsandweaknesses.人人都有優(yōu)缺點。(3)Atpresent，Americaistakingsomemeasurestostrengthentheeconomy.目前美國正在采取措施以鞏固經(jīng)濟。[題組訓練](1)用strength的正確形式填空①Visionandambitionarehisgreat.②Theexercisesaredesignedyourstomachmuscle.③Thereisevidenceofalinkbetweenexerciseandahealthyheart.(2)完成句子①他用盡全力舉起那塊石頭。Heliftedthestone.②她沒有力氣繼續(xù)走下去了。Shedidn’tanyfurther.經(jīng)典句式1.Theyareoftensothickthatyoucannotseethesun，andthewindissometimesstrongenoughtomovesanddunes.沙塵暴常常很大，以至于遮住了太陽，有時風力大得足以移動沙丘。[歸納拓展](1)本句中的so...that...意為“如此……以至于……”。so是副詞，修飾形容詞或副詞；that引導結果狀語從句。具體有以下幾種形式：eq\b\lc\{\rc\(\a\vs4\al\co1(so＋adj./adv.＋that從句,so＋adj.＋a/an＋可數(shù)名詞單數(shù)＋that從句,so＋many/few/much/little＋可數(shù)名詞復數(shù)或,不可數(shù)名詞＋that從句))(2)such...that...中的such常用來修飾名詞。主要有以下幾種形式：eq\b\lc\{\rc\(\a\vs4\al\co1(such＋a/an＋adj.＋可數(shù)名詞單數(shù)＋that從句,such＋adj.＋不可數(shù)名詞＋that從句,such＋adj.＋可數(shù)名詞復數(shù)＋that從句))(3)當little表示“小”而不表示“少”時，必須用such修飾，如：suchalittleboy/suchlittleboys；而當little表示“少”而不表示“小”時，用so修飾，如：solittlewater。(4)so和such放在句首時，主句要用部分倒裝。(5)sothat也可連在一起使用，引導結果狀語從句或目的狀語從句；引導目的狀語從句時相當于inorderthat。[語境助記](1)Heissoexcellentastudentthatweallwanttomakehimourexample.他是個如此優(yōu)秀的學生，以至于我們都想以他為榜樣。(2)ThereweresomanypeopletherethatIwasn’tabletopickherout.那兒有很多人，以至于我沒認出她來。(3)SocarelesswasDavidthathedidn’tpassthefinalexam.David如此粗心，以至于他沒通過期末考試。(4)Wegotupearlysothat/inorderthatwecouldcatchthefirstbus.我們很早就起床了，以便能趕上第一班公共汽車。[題組訓練](1)句型轉換①Itwassohotadaythatnobodywantedtodoanything.Itwasthatnobodywantedtodoanything.②TheteacherspokesofastthatIcouldnotfollowhim.theteacherthatIcouldnotfollowhim.(2)單句改錯Hehadmadesogreatprogressthattheteacherpraisedhim.2.Thestormssometimescontinuealldayandtrafficmovesveryslowlybecausethethickdustmakesitdifficulttosee.沙塵暴有時持續(xù)一整天，車輛開得很慢，因為濃濃的塵埃降低了能見度。[歸納拓展]makesitdifficulttosee是make＋it＋adj./n.＋todo結構，it是形式賓語，代替后面的動詞不定式短語。常用于此結構的動詞還有feel，think，find，consider等。[語境助記](1)Thelocationmadeitdifficulttoleadaquietpersonallife.這地方很難讓人安靜地生活。(2)I’vefounditinterestingtotalkwithforeignersinEnglish.我發(fā)現(xiàn)用英語與外國人交談非常有趣。(3)I’vemadeitarulenevertohurry.我已養(yǎng)成凡事從容不迫的習慣。[題組訓練](1)單句語法填空①Thetwogirlsaresoalikethatstrangersfinddifficulttotellonefromtheother.②Ifoundithard(take)inwhattheteachersaid.(2)完成句子①Hefelt(被邀請來參加這個晚會是件很榮幸的事).②Theythink(大學生掌握一門外語是很有必要的).難句分析Thisisaprocessthathappenswhenlandbeesdesertbecauseofclimatechangesandbecausepeoplecutdowntreesanddigupgrass.句式分析：本句是一個復合句。主句是；thathappens...為從句修飾process；whenland...為從句；becauseofclimatechanges和becausepeoplecutdowntreesanddigupgrass分別是和從句。自主翻譯：Ⅰ.單詞拼寫1.Accordingtotheweather(預報)，ahurricaneislikelytohitGuangdongProvincetonight.2.Thatpoliticianwonthepresidentialelection(活動)andbecamethePresident.3.The(過程)offindingBengaltigersismostappealing.4.It’sdangerousto(騎自行車)inthethickfog.5.She’sItalianbybirthbutisnowanAustralian(公民).6.Idon’thaveanystoclimbanyfurther.7.Therewasamofpeoplearoundtheclubcenter.8.Itis(嚇人的)whenatigerisangry.9.Acloudofdroseasthetruckdroveoff.10.Becauseofthesweepofthes，sandwasallovertheskyoftheentirecity.Ⅱ.選詞填空eq\x(cutdown；massesof；becaughtin；oneafteranother；asaresultof)11.Theshipaterriblestormandlostitscontrol.12.Therearemanypeoplewhowanttoearnsomemoneybytrees.13.Thesurfaceofourearthiscoveredwithwater.14.Itwastimeforabreakandwecameoutoftheclassroom.15.Shediedherinjuries.Ⅲ.句型轉換16.Igotupearlythismorningtocatchtheearlytrain.IgotupearlythismorningIcouldcatchtheearlytrain.17.Theboywassocleverthathewasabletoworkoutthepuzzle.Theboywascleverworkoutthepuzzle.18.Shemadesuchagoodmealthatweallatefartoomuch.Shemadesothatweallatefartoomuch.19.Itappearedthatshehadbeenkeptwaitingforalongtime.Sheappearedwaitingforalongtime.20.Itwasdifficultforustoarriveattheairportontimebecauseoftheheavyrain.Theheavyrainforusattheairportontime.Ⅳ.課文語法填空Sandstorms，strongdrywinds21.carrysand，havestrucksomeAsiancountriesforcenturies.Asaresultofdesertification，sandstormsinChinaseemto22.(increase)inrecentyears.Thisisaprocessthathappens23.landbeesdesertbecauseofclimatechangesand24.peoplecutdowntreesanddigupgrass.NorthwestChinaispartofthesandstormcentreinCentralAsia.Sandstormssometimeshave25.verybadeffectonBeijing,26.(especial)onitsweatherandtraffic.Tosolvetheproblem，manywayshavebeentried.Forexample，inordertostopthedesert,27.isonly250kmawaytothewest，28.(e)nearertoBeijing，thegovernmentisplantingtrees.Sofar，over30billiontrees29.(plant)and30.(many)treeswillbeplantedforthenextfiveyears.

答案精析話題導入1.Foreigncountries.2.Itmeans“goingdown”.3.China.基礎自測Ⅰ.1.frightening；frigh