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LessonLesson43课文&Keycan/beable1.In1929,threeyearsafterhisflightovertheNorthPole,theAmericanexplorer,R.E.Byrd,successfullyflewovertheSouthPoleforthefirsttime.1.In1929,threeyearsafterhisflightovertheNorthPole,theAmericanexplorer,R.E.Byrd,successfullyflewovertheSouthPoleforthefirsttime.flyoverforthefirst2.Though,atfirst,2.Though,atfirst,Byrdandhismenwereabletotakeagreatmanyphotographsofthemountains…,theysoonranintoserioustrouble.atatbeabletodosth.agreatmany…takephotographsofrunintocanbeableto3.Though,atfirst,3.Though,atfirst,Byrdandhismenwereabletotakeagreatmanyphotographsofthemountainsthatlaybelow,…thatthatlay4.Atonepoint,itseemedcertainthattheir newouldseem+it newouldcrash4.Atonepoint,itseemedcertainthattheir newould newouldcrashseemeditseemedcertainthat newould newouldcrashseemed

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