Whyisthatsomepeoplelivetobeoverahundred，whilemostofusdiemuchsooner？Well，ifyourparentsandgrandparentslivedalongtime，youhaveagoodchanceoflivingalongtime，too．Howlongyoulivealsodependsonwhereyoulive．ApersonwholivesinacityinAustraliawillprobablylivelongerthanapersonwholivesinapoorpartofAfrica．

Wehavenocontroloveroourpastrelatives，andmostpeoplehavelittlecontroloverwheretheylive．So，whatcanyoudotoaddmoreyearstoyourlife？Youcanmakehealthychoice．Thatmeanseatinghealthyfoodsandgettingenoughexercise．

Beingoverweightmaymakeyourlifeshorterbecauseyouhaveahigherchancetohavehealthproblems．Asaresult，youcanstartbychangingwhatyoueat．Eatlessredmeat．Instead，eatchickenorfish．Fishisreallygoodforhelpingyoulivealongerlife．Youshouldalsoeatlotsofvegetablesandmakesureyouaregettingallofthevitaminsyouneed．And，ofcourse，donoteattoomuchjunkfood．

Youalsoneedtogetenoughexercise．Therearedifferenttypesofexercise．Someexerciseisgoodforyourheart．Othertypesofexercisearegoodformakingyoustrong．Liftingweightsisagoodexample．Youshouldtrytoexerciseforaboutthirtyminuteseveryday．

Youshouldtakecareofyourbody，alsoyouhavetotakecareofyourmind．Don'tworktoohard．Trytorelaxanddosomethingfuneachday．Ifyoufollowtheserules，youhaveagoodchanceoflivingalongtime．

52．Howdoyouexplain"toaddmoreyearstoyourlife"inparagraph2？___

A．Tolivelonger

B．Toliveshorter．

C．Tolivebetter．

D．Toliveworse．

53．Inthewriter'sopinion，liftingweightsisgoodexercise___．

A．toourheart

B．toourmind

C．tomakeusstrong

D．tomakeusrelax

54．Accordingtothepassage，alongerlifehasnothingtodowith___．

A．one'spastrelatives

B．one'sknowledge

C．one'slivingplaces

D．waysoflife

55．What'sthepassagemainlyabout？___

A．Howtogetmoreexercise

B．Howtotkecareofyourmind．

C．Howtolivelonger

D．Howtoeatbetter．