階段質量檢測（四）Unit4學業質量標準檢測第一部分：聽力(略)第二部分：閱讀理解(共兩節，滿分40分)第一節(共15小題；每小題2分，滿分30分)閱讀下列短文，從每題所給的A、B、C和D四個選項中，選出最佳選項。A(2018·河北省邯鄲市高一上學期期末)FourworstearthquakesinthisworldNorthernSumatra,IndonesiaMagnitude(震級)—8.6,Date—March28,2005AnearthquakehappenedatSumatraIslandsinthetouristymonthofMarch．Beinganislandarea,theearthquakegaverisetoatsunami(海嘯)waveandspreadtoareasasfarasSriLanka．Thenumberofdeathsisabout1,500withmorethan400peoplegettinginjured.RatIslands,AlaskaMagnitude—8.7,Date—April02,1965Thisearthquakeonlyhappenedinsidewaterandallthelosseswerebecauseofthetsunamiwavescausedbyit．Thequakegaverisetoahugetsunamicausingalossofthousandsofdollars．Thegoodnewsinthisquakewasthatnohumanlossorinjurieswerereportedintheseislands.BioBio,ChileMagnitude—8.8,Date—February27,2010Thisquakehappenedtotakethelivesofmorethan500people．Thetsunamicausedbythisquakeaddedtotheeffectsbyforcinghundredsofthousandsofpeopletoleavetheirhome,ofwhichabout50arestillmissing．Thenumberofinjuredpeoplereachedalevelof12,000,thusmakingoneoftheworstearthquakesofthehumanhistory.Sumatra,IndonesiaMagnitude—9.1,Date—December26,2004Havingitsnametwiceinthelist,itisclearthatSumatracomesintheareathatismostprone(易于……的)toearthquakes.Just3monthsbeforetheearthquakeof8.6magnitude,thisquakecausedmuchmorelossoflifeandwealththanthelaterone!Theearthquakegaverisetoahugetsunamikillingabout300thousandpeopleallaroundthecountriesofSouthAfricaandSouthAsia.文章大意：本文介紹了人類史上的四次大地震。

21．Theearthquakeduringwhichnobodywasinjuredhappenedin__B__.A．2005B．1965D．2004C．2010解析：細節理解題。根據對第二則地震消息的介紹，特別是最后一句話“Thegoodnewsinthisquakewasthatnohumanlossorinjurieswerereportedintheseislands.”可知，1965年的這次地震無人員傷亡。22．What'sthemagnitudeoftheearthquakecausingthemostinjuries？__C__A．8.6．B．8.7.D．9.1.C．8.8．解析：細節理解題。由四則消息的介紹可知，發生在智利的震級8.8的這次地震造成了最多的人員傷亡。23．Whichareaismostlikelytobehitbyanearthquake？__A__A．Sumatra．C．BioBio．B．RatIslands.D．SouthAsia.解析：細節理解題。由最后一則消息中的第一句話“Havingitsnametwiceinthelist,itisclearthatSumatracomesintheareathatismostprone(易于……的)toearthquakes.”可知，Sumatra是最可能受到地震襲擊的地方。BPerfectDisasterAllaroundusbuildingsshook．Wedecidedtoleavethetown．Westoppedoncewehadleftthebuildingsbehindus．Thecartsweremovinginoppositedirections,thoughthegroundwasperfectlyflat,andtheywouldn'tstayinplaceevenwiththeirwheelsblockedbystones.Inaddition,itseemedasthoughtheseawasbeingsucked(吸)backwards,asifitwerebeingpushedbackbytheshakingoftheland．Certainlytheshorelinemovedoutwards,andmanyseaanimalswereleftondrysand.Behinduswerefrighteningdarkcloudsthatopeneduptoshowfire-likelightning,butbigger．Notlongafterthatthecloudsreacheddowntothegroundandcoveredthesea．Nowcamethedust,thoughstillthin．Ilookedback．Adensecloudappearedbehindus,followinguslikeafloodpouringacrosstheland．Thenadarknesscamethatwasnotlikeamoonlessorcloudynight,butmorelikebeinginaclosedandunlightedroom．Youcouldhearwomenandchildrencrying,menshouting．Somewerecallingforparents,othersforchildren;theycouldonlyrecognizethembytheirvoices.Darknessandashescameagain,agreatweightofthem．Westoodupandshooktheashoffagainandagain;otherwisewewouldhavebeencoveredwithitandcrushedbytheweight.Atlastthecloudbecamethinnerandthinneruntilitwasnomorethansmokeorfog．Soontherewasrealdaylight．Thesightthatmetourstillterrifiedeyeswasachangedworld,buriedinashlikesnow.―fromPliny'slettertoafriend文章大意：文章是Pliny寫給朋友的信，介紹地震后地動山搖，天昏地暗的情景，和人們驚慌失措的樣子。24．Plinyleftthetownafter__C__．A．theeruptionB．theskybecamedarkD．theseawentbackC．thebuildingsbeganshaking解析：細節理解題。從文章第一段的句子：Allaroundusbuildingsshook．Wedecidedtoleavethetown.可知Pliny離開城鎮是在房屋開始搖晃以后，選C。25．Thecartswouldn'tstaystillbecause__A__.A．theearthwasshakingB．theseasuckedthembackwardsC．thewheelshadstonesunderthemD．thelighteningfrightenedthehorses解析：推理判斷題。文章在說明“Thecartswere..．flat,andtheywouldn'tstayinplace...bystones.”之前已有交代，說明是大地抖動，這正是說明了產生此種結果的原因，選A。26．Thereasonwhyitwasdarkisthat__B__.A．itwasverylateatnightB．cloudsofashcoveredthesunD．therewasnomoonthatnightC．therewasaverybadstorm解析：細節理解題。根據第三段的句子：Nowcamethedust,thoughstillthin．Ilookedback．Adensecloudappearedbehindus,followinguslikeafloodpouringacrosstheland．Thenadarknesscamethatwasnotlikeamoonlessorcloudynight,butmorelikebeinginaclosedandunlightedroom.可知天黑是因為灰塵掩蓋了太陽，選B。27．Peopletriedtofindtheirrelationsbycallingouttheirnamesand__A__.A．listeningtotheirvoicesB．runningaboutlookingforthemC．shakingtheashoffpeopleD．watchingpeopleastheyranpast解析：細節理解題。根據第三段最后一句：Somewerecallingforparents,othersforchildren;theycouldonlyrecognizethembytheirvoices.可知人們想通過叫他們的名字和聽他們的聲音找到他們的親戚。C(2017·福建省龍巖四校第一學期半期考)LiBingyinisnowstudyinglawattheSternSchoolofBusinessatNewYorkUniversity．ShewrotethisletterjustbeforehurricaneSandydestroyedtheEastCoast.Dearreaders，Thestormwillreallytakeatollonthecity!RightnowIamsittinginmydormitory,waitingfortheblackout(停電)tocomeanysecond,andlisteningtothewindhowloutsidemywindows．HurricaneSandyissupposedtohittheEastCoasthardtoday．Duetothebadweather,mostschoolsanduniversitieshavecanceledclassesforMondayandTuesday.Luckily,theuniversityhastakenmeasurestoprepareforthisstorm．Universityofficialssentoute-mailswithexplanationinthecaseofablackout,evacuation(撤離),orotheremergency．Justrecently,Ireceivedseveraltextmessagesfromtheschoolaboutpoweroffincertaindormitories．Theyadvisedustoprepareabagwithessentials(生活必需品),incaseweneededtoleavethebuildingandrelocatetoasaferlocation.YesterdayIwentouttobuyaflashlight,butallofthenearbystoresweresoldout．Everyonewasstockingupon(存儲)water,foodandothersuppliesforthestorm.Rightnowthecityisunusuallyquiet．Onanyotherday,therewouldbethesoundsofcars,peoplechatting,andstreetartistsperforming．Tonight,there'sjustthewindandrainhittingthewindow．Thesubwaysystemhasbeenclosedsincelastnight,andthereisrarelyanyoneonthestreets．HopefullyHurricaneSandywillsoonpasswithoutleavingmuchdamage.Sincerely，LiBingyin文章大意：本文是一封書信。一個就讀于紐約大學的學生講述一場將要侵襲紐約的暴風雨。28．Fromthepassagewecanknowthat__B__.A．StormSandyhasalreadycausedgreatdamagetoNewYork.B．Theauthorwentouttobuyaflashlightbutfailed.C．Mostpeoplehaven'tbeenpreparedforthecomingofStormSandy.D．Mostschoolsanduniversitieshavecanceledclassesfor3days.解析：考查細節理解。根據第三段第一句“YesterdayIwentouttobuyaflashlight,butallofthenearbystoresweresoldout.”可知，作者去買手電筒但是沒有買到。故選B。根據第一段第一句可知，暴風雨還沒有造成損失，故A項錯誤；根據第三段第二句可知，大部分人都做了準備，故C項錯誤；根據第一段最后一句可知，大部分學校已經放假兩天，故D項錯誤。29．Whatmeasureshastheuniversitytakentoprepareforthestorm？__D__A．Theuniversityhasaskedstudentstoleavetheschoolatonce.B．Theuniversityhasaskedstudentstocloseallthewindowsanddoors.C．Theuniversityhassenttextmessagestostudentsaboutwhattimethestormwillcome.D．Theuniversityhasaskedstudentstopreparenecessarythingsincaseofevacuation.解析：考查細節理解。根據第二段最后一句essentials(生活必需品),incaseweneededtoleavethebuildingandrelocatetoasaferlocation.”D。30．Whatdoestheunderlinedword“takeatoll”means？__A__“Theyadvisedustoprepareabagwith可知，學校讓學生們準備必需品以防撤離。故選A．causealossC．floodB．destroyD．bury解析：考查詞義猜測。根據文章最后一句“HopefullyHurricaneSandywillsoonpasswithoutleavingmuchdamage”可知，暴風雨還沒有到達這個城市，作者希望它很快過去不會留下太多破壞。因此推斷畫線句句意是：這場暴風雨會對這個城市造成破壞，所以畫線詞意思是：造成損失。故選A。31．Whatcanweinferfromthelastparagraph？__B__A．NewYorkisaquietcityatothertimes.B．NewYorkisabusycityatothertimes.C．StormSandyhasalreadycome．D．Theairportsystemhasbeenclosedsincelastnight.解析：考查推理判斷。根據最后一段第二句“Onanyotherday,therewouldbethesoundsofcars,peoplechatting,andstreetartistsperforming.”可知，平時的紐約城，大街上總是有許多汽車聲、人聲，還有許多藝術家在表演，因此推斷，在其他時候，紐約是一個忙碌的城市。故選B。D(2018·河南省實驗中學上學期期中)Earthquakesaresomethingthatpeoplefear．Therearesomeplacesthathavefewornoearthquakes．Mostplacesintheworld,however,havethemregularly．Countriesthathavealotofearthquakesareusuallyquitemountainous.ThemosttalkedaboutearthquakeintheUnitedStateswasinSanFranciscoin1906．Over700peoplediedinit．ThestrongestoneinNorthAmericawasin1964．IthappenedinAlaska.Strongearthquakesarenotalwaystheonesthatkillthemostpeople．In1755,oneofthestrongestearthquakeseverrecordedwasfeltinPortugal．Around2,000peopledied.In1923,averystrongearthquakehitTokyo,YokohamaareaofJapan．Ahundredandfortythousandpeopledied．Mostofthemdiedinfireswhichfollowedtheearthquake.OneoftheworstearthquakeseverwasinChinain2008．Itkilledalargenumberofpeople．TheworstearthquakeeverreportedwasalsoinChina,inwhich400,000peoplewerekilledorinjured．Thisearthquakehappenedin1556.Earthquakesworrypeoplealot．Thereasonisthatweoftendonotknowwhentheyarecoming．Peoplecannotprepareforearthquakes.文章大意：本文屬于科普文章。本文主要講述的是地震及歷史上幾次有名的地震情況。32．Earthquakeshappen__C__.A．inalltheplacesintheworldB．onlyinthecountriesthathavealotofmountainsC．regularlyinmostplacesintheworldD．onlyinafewplacesalongthecoast解析：細節理解題。根據第一段最后部分的“Therearesomeplacesthathavefewornoearthquakes．Mostplacesintheworld,however,havethemregularly．Countriesthathavealotofearthquakesareusuallyquitemountainous.”有些地方很少或根本沒有地震。然而，世界上大多數地方的地震都有規律的。地震頻繁的國家通常是多山的?？芍卣鸲鄶蛋l生在多山的地方，因而是有規律的。分析選項可知C項符合題意。B項錯在only。33．Whenandwherewastheworstearthquakeeverreported？__B__A．In1964inAlaska．C．In1923inJapan．B．In1556inChina.D．In2008inChina.解析：細節理解題。根據文章第五段中的China,inwhich400,000peoplewerekilledorinjured．Thisearthquakehappenedin1556．”可知，最可怕的地震是1556年發生在中國的。故選B項。“Theworstearthquakeeverreportedwasalsoin34．Accordingtothepassage,whichofthefollowingisNOTtrue？__A__A．Thestrongertheearthquakeis,themorepeoplearekilled.B．Earthquakesoftencomeunexpectedly.C．Earthquakescancausefires.D．Peoplestilldon'tknowhowtotellwhenanearthquakewillcome.解析：細節理解題。根據文章第三段第一句killthemostpeople.”(強地震并不總是造成大多數人死亡的地震D三項根據常A項?！癝trongearthquakesarenotalwaystheonesthat)可知A項不正確，而B、C、識可知都是正確的。因此選35．Whatmaybetalkedaboutintheseventhparagraph？__B__A．Howdoearthquakesworrypeople?B．Whatwillpeopledotoprepareforearthquakes?C．Howcanwesavepeoplewhenearthquakeshappen?D．Howdoearthquakeshappen?解析：推理thatweoftendonotknowwhentheyarecoming．Peoplecannotprepareforearthquakes.”(地震能為地震做準備)。分析句意判斷題。根據文章最后一段中的“Earthquakesworrypeoplealot．Thereasonis使人們擔憂。原因是我們常常不知道它們什么時候來。人們不知，人們對地震是沒辦法做很多準備的，接下來的將是人們能夠做的事情。分析選項可知B項(人們能為地震準備做些什么)符合題意，故選B項。2分，滿分10分)第二節(共5小題；每小題根據短文內容，從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項。Earthquakescanstrikewithoutwarning．Butmanyinjuriesanddeathsfromthiskindofnaturaldisatercanbepreventedifpeoplefollowthesesafetytips.Ifyou'reinsideabuilding,staythere!Oneofthemostdangerousthingstodoinanearthquakeistotrytoleaveabuilding．__36.G__Droptotheground．Getunderanobject(物體)thatisnoteasilydamaged．Holdontoituntiltheshakingstops．Youcanalsogettoacornerformedbytwowallswithyourarmsoveryourhand．Ifyou'reinbedwhenthequakehits,staythereandprotectyourheadwithapillow.__37.B__Don'ttakeshelterunderatree,streetlights,electricpolesortallbuildings．Ifyouaredriving,stopasquicklyaspossibleandstayawayfromoverpasses(立交橋),buildings,bridgesoranythingelsethatmightfallorcollapsebeneathyou．__38.D__Ifyouaretrappedinruins,coveryourmouthwithahandkerchieforapieceofclothing．Useyourcellphonetocallforhelpifpossible．Don'tshout．__39.C__Tap(敲)onapipeorthewallsorescuerscanfindyou.Bepreparedforaftershocks．__40.F__However,sometimestheyevenhappenmonthslater．Therefore,ifyouarenotinasafeposition(位置)afterthefirstshock,youshouldmovequicklybutcarefullytoasaferplace.A．Don'tmoveaboutorkickupdust.B．Ifyou'reoutside,gotoanopenspace.C．Shoutingcancauseyoutobreatheindust.D．Don'tparkyourcarunderatreeoranytallobject.E．Takeagoodholdofyourcellphoneinthebuilding.F．Theycanhappeninthefirsthoursaftertheearthquake.G．Mostinjurieshappenwhenpeopleinsidebuildingstrytogoout.解析：36．根據前面的內容“不要離開大樓”可知37．由后文可知，38．由前文“如果你在開車”可知，選D。39．該句與前面的“不要大喊大叫”互應。40．由前文“準備”可知第三部分：英語知識運用(共兩節；滿分。這是在戶外的應急措施。余震。45分)第一節：完形填空(共20小題；每小題1.5分，滿分30分)閱讀下面短文，從短文后各題所給的A、B、C和D四個選項中，選出可以填入空白處的最佳選項。(2017·重慶市一中高一月考)Itwasacold,wetdayonJune6,2016,when14-year-oldWasanaarrivedatschool．Waitingoutsidehisclassroomforhisclassmatesto__41.A__,_Wasanastaredatthe__42.C__.Thenhiseyesfelluponthe18-metre-highhillthat__43.B__atthebackoftheclassroom.He__44.A__largeamountsofrainwaterflowingdownthehill,andwaterwasalsobubbling(冒泡)atthebaseofarockonthehill．Forafew__45.B__,Wasanastaredatthewater,wonderingwhyitlookedso__46.D__.Thenithithim—whathesawwas__47.A__tothevideohewasshownduringDisasterManagementclasses．Fearinga__48.C__disaster,heshouted__49.B__atthestudentswaitingoutsidetheirclassrooms．“Run,run,don'tstayhere!The__50.A__onthehillisgoingtofallonus!”Chaos(混亂)brokeout__51.C__thestudentsrantotheopenarea,emergencygatheringpoint(緊急聚集處)．Whensometeachers__52.D__Wasana,heshowedthemthewatergushingfromthehill,andtheystartedleadingthestudentstosaferground.JustthenPrincipalGurusinghedroveintotheschool．Wasanaranovertotellhimwhatwashappening．Afterexaminingthesite(現場),Grrusingheknewtheschoolwasin__53.C__．Theenormousrockatthetopofthehillcouldcomefallingdown__54.B__.__55.B__agroupofteachersandolderstudents,Gurusingheclimbedthehillandtriedtomakethewaterflowawayfromtherock．Theyweretoo__56.A__．Tenminuteslater,theyheardaloud__57.A__asthehugerockrusheddownthehill．TherewaslittleGurusingheandhisgroupcoulddoastheywatchedtheearth__58.C__theirclassrooms．ThankstoWasana's__59.B__action,__60.D__washurtintheaccident(事件)．文章大意：當Wasana看到山上的雨水聚集的奇怪景象時，他聯想到在災難管理課上學到的知識，預知一場山體滑波即將發生，及時向同學和老師們發出警告，讓大家及時逃離到安全地帶，阻止了原本有可能造成的生命危險事故的發生。41．A．arriveC．reviseB．restD．talk解析：當Wasana到達學校后，他等候在教室外面等待其他同學的“到來”。42．A．bookC．rainB．sunD．hill解析：下一句提到他的眼光落到了那座山上，下一段的開頭部分提到他看到大量雨水從山上流下來，由此可推斷他目不轉睛地盯著“雨水”。43．A．placedB．stoodC．hidD．faced解析：那座山44．A．noticedC．knew“聳立”在教室的后面。stand表示“位于(某處)”。B．feltD．heard解析：他“注意到”大量雨水從山上流淌下來，水在山上的一塊巖石下冒泡。45．A．yearsC．hoursB．minutesD．days解析：他看了幾“分鐘”。46．A．interestingC．movingB．dangerousD．familiar解析：下一句提到他在教室么這一切看起來如此“熟悉”。47．A．similar內播放的錄像中看到過類似的景象，所以讓他困惑的是為什B．familiarD．closeC．near解析：他突然想到這種“場面”與錄像中出現的場面“類似”。B．staringD．leaving內容可知他感覺災難“即將到來”。48．A．goingC．coming解析：根據下一句中的49．A．happilyC．rudelyB．loudlyD．angrily解析：他感到災難即將到來，所以“瘋狂地”朝等候在教室外面的學生喊叫，讓他們跑離這個危險之地。50．A．rockC．treeB．sandD．water解析：本段前半部分提到他注意到雨水在一塊巖石下冒泡，并意識到了潛在的危險，所以他預感“巖石”要從山上滾下來。51．A．untilC．asB．ifD．although解析：上文提到他讓等候在教室外面的學生離開這個地方，所以當學生們跑到空曠的指的定緊急事故集合點時，混亂發生了。52．A．questionedB．respectedC．instructedD．approached解析：當一些老師“靠近”他的時候，他讓他們看了從山上涌下來的水，然后他們開始帶領學生去更為安全的地方。

53．A．safetyC．dangerB．damageD．need解析：Wasana跑過去告訴了校長發生的事情，校長“查看”了這個地點后，知道這所“危險”之中。indanger“處于危險之中”。學校處于54．A．aperiodoftimeC．atonetimeB．atanytimeD．forsometime解析：55．A．OrganizingC．Asking山頂的巨大巖石“隨時”可能墜落下來。B．LeadingD．Helping解析：校長“帶領”著一群老師和年齡比較大的學生爬上了山，試圖讓水從巖石處流走。56．A．lateC．nervousB．earlyD．careful解析：57．A．soundC．voice根據本句后半部分中的內容可知他們太“遲”了，一切努力都無濟于事。B．wordD．shout解析：巨大的巖石滑下山坡“聲音”巨大。58．A．moveC．coverB．rushD．wave解析：59．A．crazyC．patient校長和他的團隊眼睜睜地看著泥水“吞噬”了教室，卻無能為力。B．quickD．direct解析：行動非?！把杆佟?。60．A．someoneC．anyone文章前半部分提到Wasana帶領學生提前離開了這個危險的地方，由此可知他的B．onlyoneD．noone解析：多虧了Wasana的快速行動和仔細觀察，第二節：(共10小題；每小題1.5分，滿分15分)閱讀下面短文，在空白處填入1個適當的單詞或括號內單詞的正確形式。(2018·福建省龍巖市長汀一中高一上期中)a．m.everythingbegantoshake．__61.It__seemedasiftheworldwasatanend！“沒有人”在這事次故中受傷。AtElevenkilometersdirectlybelowthecityoneofthegreatest__62.earthquakes__(earthquake)ofthe20thcenturyhadbegun.ItwasfeltinBeijing,__63.which__ismorethantwohundredkilometersaway.One-thirdofthenationfeltit.Ahugecrackthatwaseightkilometerslongandthirtymetreswidecutacrosshouses，roadsandcanals.Steamburstfromholesintheground.Hardhillsofrockbecameriversof__64.dirt__(dirty)．In15terriblesecondsalargecity__65.lay__(lie)inruins.The__66.suffering__(suffer)ofthepeoplewasextreme.Two-thirdsofthepeoplediedor__67.wereinjured__(injure)duringtheearthquake.Thousandsoffamilieswerekilledandmanychildrenwereleft__68.without__parents.Thenumberofpeople__69.who/that__werekilledor__70.seriously__(serious)injuredreachedmorethan400,000.文章大意：本文主要敘述了唐山大地震的過程，劇烈程度以及大地震所帶來的破壞和死亡狀況。解析：61．考查固定句型。Itseemedasif是英語的固定句型“好像……”。句意：好像是世界末日。62．考查式，所以答案填earthquakes。63．考查定。先行詞是Beijing，在定語從句中作主語，因為是非限制性定語從句，所以用which來引導。64．考查65．考查時態。唐山地震發生在上個世紀，所以動詞用過去時，lie的過去式是lay。66．考查子可知此處要填的是主語，所以用suffering作主語，意為“傷害”。67．考查謂語動詞用復數形式，所以答案填wereinjured。68．考查介詞。很多的孩子成了孤兒，without是介詞“沒有”。69．考查定。先行詞是people，在定中作主語，所以用who或者that來名詞的數。根據句意：世界上最大的地震之一，oneof后跟可數名詞的復數形語從句名詞。分析句子可知此處要填名詞，dirt是名詞“塵土，灰塵”。非謂語動詞。分析句主謂一致。句意：三分之二的人死了或者受傷，主語是Two-thirdsofthepeople，語從句語從句引導。70．考查副詞。此處是用副詞來修飾形容詞injured，嚴重受傷。(滿分35分)短文改錯(共10小題；每小題1分，滿分第四部分：寫作第一節：10分)假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌的以下作文。文中共有10處錯誤，每句中最多有兩處。錯誤涉及單詞的增加、刪除或修改。增加：在缺詞處加一個漏詞符號(∧)，并在此符號下面寫出該加的詞。刪除：把多余的詞用斜線(\)劃掉。修改：在錯詞下面畫一橫線，并在該詞下面寫出修改后的詞。注意：1.每處錯誤及其修改均僅限一詞；2．只允許修改10處，多者(從第11處起)不計分。Sandstormshavebeenamajordisasterformanycountriesforcentury．Sandstormsbeganindesertareas．Thisisprocessthathappenswhenlandbecomesdesertbecauseofclimatechangesandbecauseofpeoplecutdowntreesanddigupgrass.Thestormssometimescontinuealldayandthetrafficmoveveryslowlybecausethethickdustmakesitdifficultlytosee．Whenasandstormarrivesthecity,weatherexpertsadvisepeopledonottogoout．It'sdifficulttobreath,andthedustmakespeopleillness.答案：Sandstormshavebeenamajordisasterformanycountriesforcentury．Sandstormsbegancenturiesbeginindesertareas．Thisis∧processthathappenswhenlandbecomesdesertbecauseofclimateachanges