【EveryhourspentinwatchingTVDVDsandvideosasanadultreduceslifespanbyalmost22minutesastudysuggests.AndviewingTVforanaverageofsixhoursadaycancutshortyourlifebyfiveyears.Theresearchshowsthatasedentary】

　　EveryhourspentinwatchingTVDVDsandvideosasanadultreduceslifespanbyalmost22minutesastudysuggests.AndviewingTVforanaverageofsixhoursadaycancutshortyourlifebyfiveyears.

　　Theresearchshowsthatasedentary（久坐的）lifestyleisasbadforhealthassmokingandobesitybecauseofthedangerscausedbyinactivityandthegreateropportunitiesitoffersforunhealthyeating.

　　Theresearcherssetouttocalculatetheoverallrisktolifespanfromwatchingtelevision.Theirresearchinvolvedmorethan11000peopleovertheageof25.

　　WritingintheBritishJournalofSportsMedicinetheyconcluded."TVviewingtimemaybeconnectedwithalossoflifewhichissimilartoothermajorchronicdiseaseriskfactorssuchasphysicalinactivityandobesity."

　　TheresearchersfromtheUniversityofQueenslandusedinformationfromtheAustralianDiabetesObesityandLifestyleStudytogetherwithpopulationanddeathratedata.

　　Buttheysaid:"AlthoughweusedAustraliandatatheeffectsinotherindustrializedanddevelopingcountriesarelikelytobesimilarconsideringthelargeamountsoftimespentwatchingTVandsimilaritiesindiseasepatterns."IntheUnitedKingdomtheaverageamountoftimespentwatchingTVisfourhoursadaycomparedwithfivehoursintheUnitedStates.

　　Earlierthisyearaseparatestudysuggestedtheriskofdevelopingdiabetesandheartdiseaseordyingearlyrisesbyasmuchas20percentafterjusttwohoursadayinfrontofthebox.

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

　　【小题1】Wecanlearnfromthepassagethat .

　　A．whetheryouwatchTVornothasnothingtodowithhowlongyouwillliveB．ifanadultwatchesTVforsixhourseverydayhewillprobablydiefiveyearsearlierC．physicalinactivityandobesitywon'tshortenyourlifeD．asedentarylifestyleoffershugebenefits.【小题2】Thepassageimpliesthat_______.A．Th