JohnSnowwasafamousdoctorinLondon-______expert,indeed,thatheattendedQueenVictoriaasherpersonal______(physical).Buthebecameinspiredwhenhethoughtabouthelpingordinarypeopleexposedtocholera.Thiswasthe______(die)diseaseofitsday.Neitheritscause______itscurewasunderstood.Somanythousandsofterrifiedpeoplediedeverytime______wasanoutbreak.JohnSnowwantedtofacethechallengeand______(solve)thisproblem.Heknewthatcholerawouldnever______(control)untilitscausewasfound.Hebecameinterestedintwotheoriesthat______(possible)explainedhowcholerakilledpeople.Thefirstsuggestedthatcholeramultipliedintheair.Acloudofdangerousgasfloated______untilitfoundits______(victim).Thesecondsuggestedthatpeopleabsorbedthisdiseaseintotheirbodieswiththeirmeals.Fromthestomachthediseasequicklyattackedthebodyandsoontheaffectedpersondied.JohnSnowsuspectedthatthesecondtheorywascorrect______heneededevidence.SowhenanotheroutbreakhitLondonin1854,hewasreadytobeginhis______(enquire).______thediseasespreadquicklythroughpoor______(neighbor),hebegantogatherinformation.Intwoparticularstreets,thecholeraoutbreakwassoseverethatmorethan500peoplediedintendays.Hewasdeterminedtofindoutwhy.Firsthemarkedonamaptheexactplaces______allthedeadpeople______(live).Thisgavehim______valuableclueaboutthecauseofthedisease.Manyofthe______(die)werenearthewaterpumpinBroadStreet(especiallynumbers16,37,38and40).Healsonoticedthatsomehouses(suchas20and21BroadStreetand8and9CambridgeStreet)______(have)nodeaths.Hehadnotforeseenthis,sohemadefurtherinvestigations.Hediscoveredthatthesepeopleworkedinthepubat7CambridgeStreet.They______(give)freebeerandsohadnotdrunkthewaterfromthepump.Itseemedthatthewaterwastoblame.Next,JohnSnowlookedintothesourceofthewaterforthesetwostreets.Hefoundthat______camefromtheriverpollutedbythedirtywaterfromLondon.HeimmediatelytoldtheastonishedpeopleinBroadStreet______(remove)thehandle______fromthepumpsothatitcouldnotbeused.Soonafterwardsthediseasesloweddown.He______(show)thatcholerawasspreadbygermsandnotin______cloudofgas.InanotherpartofLondon,hefound______(support)evidencefromtwootherdeathsthat______(link)totheBroadStreetoutbreak.Awoman,whohadmovedawayfromBroadStreet,likedthewaterfromthepumpsomuchthatshehaditdeliveredtoherhouseeveryday.______sheandherdaughterdiedofcholeraafterdrinkingthewater.WiththisextraevidenceJohnSnowwasabletoannounce______certaintythatpollutedwatercarriedthevirus.Topreventthisfromhappeningagain,JohnSnowsuggestedthatthesourceofallthewatersupplies______(examine).Thewatercompanieswereinstructednottoexposepeopletopollutedwateranymore.FinallyKingCholerawasdefeated.COPERNICUS’REVOLUTIONRRYTHEORYNicolausCopernicuswasfrightenedandhismind______(confuse).Althoughhe______(try)toignorethem,allhismathematicalcalculationsled______thesameconclusion:______theearthwasnotthecentreofthesolarsystem.Onlyifyouputthesuntheredidthemovementsoftheotherplanetsintheskymakesense.Yethecouldnottellanyoneabouthistheoryasthe______(power)ChristianChurchwouldhavepunishedhimforevensuggestingsuch______idea.TheybelievedGodhadmadetheworldand______thatreasontheearthwasspecialandmustbethecentreofthesolarsystem.Theproblemarosebecauseastronomershadnoticedthatsomeplanetsintheskyseemed______(stop),movebackwardandthengoforward______aloop.Othersappeared______(bright)attimesandlessbrightatothers.Thiswasverystrangeiftheearthwasthecentreofthesolarsystemandallplanetswentroundit.In1514heshowedit______(private)tohisfriends.Thechangeshemade______theoldtheorywererevolutionary.Heplaceda______(fix)sunatthecentreofthesolarsystemwiththeplanetsgoingrounditandonlythemoonstillgoingroundtheearth.Healsosuggestedthattheearth______(spin)asitwentroundthesunandthisexplainedchangesinthemovementoftheplanetsandinthe______(bright)ofthestars.Hisfriendswereenthusiasticandencouragedhimtopublishhis______(idea),butCopernicuswascautious.HedidnotwanttobeattackedbytheChristianChurch,soheonlypublishedit______helaydyingin1543.Certainlyhewasright______(careful).TheChristianChurchrejectedhistheory,______(say)itwasagainstGod'sideaandpeoplewhosupporteditwouldbeattacked.YetCopernicus'theoryisnowthebasisonwhichallourideasoftheuniversearebuilt.HistheoryreplacedtheChristianideaofgravity,whichsaidthingsfelltoearthbecauseGodcreatedtheearthasthecentreoftheuniverse.Copernicusshowedthiswasobviouslywrong.Nowpeoplecanseethatthereisadirectlink______histheoryandtheworkofIsaacNewton,AlbertEinsteinandStephenHawking.Peoplemaywonder______differentwordsareusedtodescribethesefourcountries:England,Wales,ScotlandandNorthernIreland.YoucanclarifythisquestionifyoustudyBritishhistory.FirsttherewasEngland.Wales______(link)toitinthethirteenthcentury.NowwhenpeoplerefertoEnglandyoufindWalesincluded______well.NextEnglandandWaleswerejoinedtoScotlandintheseventeenthcenturyandthenamewaschangedtoGreatBritain.Happilythiswasaccomplished______conflictwhenKingJamesofScotlandbecameKingofEnglandandWalesaswell.FinallytheEnglishgovernmenttriedintheearly______(twenty)centurytoformtheUnitedKingdom______gettingIrelandconnectedinthesamepeacefulway.______,thesouthernpartofIrelandwas_