答案：【1】D【解析】根据第一段Just21daysafterleavingtheNorwegianislandofSpitsbergen,anarcticfoxhadarrivedinGreenland.Andinthreemonths,itmadeittoCanada可知，从Norwegianisland到Greenland北极狐花了21天，三个月之后，抵达加拿大。所以从Norwegian到Canada时间超过了三个月【2】B【解析】根据第二段Thedatawasreal,thescientistsdecidedasthefoxkeptgoing…theanimalisknownforitsenduranceandabilitytosurviveinharshpolarareas联系上下文可知，这里的theanimal指的是狐狸，所以答案是B【3】C【解析】根据第三段Butthefoxtheseresearchersfollowedstoodoutforjusthowfastitcoveredmorethan2,700miles(4,350kilometers)可知，答案是C【4】C【解析】根据第四段ThecoastalfoxtheresearcherstrackedlandedinEllesmereIslandinCanadaon1July2018.Ofthe50or60animalsthescientistsputtrackersonforastudy...可知，答案是C【5】A【解析】根据第五段Theresearchersthinkthefoxmayhavetakenoffbecauseofafoodshortage可知，答案是A