【EveryhourspentinwatchingTVDVDsandvideosasanadultreduceslifeexpectancybyalmost22minutesastudysuggests.AndviewingTVforanaverageofsixhoursadaycancutshortyourlifebyfiveyears.Theresearchclaimsthata】

　　EveryhourspentinwatchingTVDVDsandvideosasanadultreduceslifeexpectancybyalmost22minutesastudysuggests.AndviewingTVforanaverageofsixhoursadaycancutshortyourlifebyfiveyears.

　　Theresearchclaimsthatasedentary(久坐的)lifestyleisasbadforhealthassmokingandobesitybecauseofthedangerscausedbyinactivityandthegreateropportunitiesitoffersforunhealthyeating.

　　Theacademicsconductingthestudysetouttocalculatetheoverallrisktolifeexpectancyfromwatchingtelevision.Theirresearchinvolvedmorethan11000peopleovertheageof25.

　　WritingintheBritishJournalofSportsMedicinetheyconcluded."TVviewingtimemaybeassociatedwithalossoflifewhichissimilartoothermajorchronicdiseaseriskfactorssuchasphysicalinactivityandobesity."

　　TheresearchersfromtheUniversityofQueenslandusedinformationfromtheAustralianDiabetesObesityandLifestyleStudytogetherwithpopulationanddeathratedata.

　　Buttheysaid:"AlthoughweusedAustraliandatatheeffectsinotherindustrializedanddevelopingcountriesarelikelytobesimilarconsideringthelargeamountsoftimespentwatchingTVandsimilaritiesindiseasepatterns."IntheUnitedKingdomtheaverageamountoftimespentwatchingTVisfourhoursadaycomparedwithfivehoursintheUnitedStates.

　　Earlierthisyearaseparatestudysuggestedtheriskofdevelopingtype2diabetesandheartdiseaseordyingearlyrisesbyasmuchas20percentafterjusttwohoursadayinfrontofthebox.

　　England'sChiefMedicalOfficerSallyDaviessaid:"Physicalactivityoffershugebenefitsandthesestudiesbackwhatwealreadyknow-thatasedentarylifestylecarriesadditionalrisks.Wehopethesestudieswillhelpmorepeoplerealizethattherearemanywaystogetexercise."

　　1.Wecanlearnfromthepassagethat_______

　　A．whetheryouwatchTVornothasnothingtodowithhowlongyouwilllive

　　B．ifanadultwatchesTVforsixhourseverydayhewilldiefiveyearsearlier

　　C．physicalinactivityandobesitywon'tshortenyourlife

　　D．asedentarylifestyleoffershugeben