[简答]  选择题　　Babieswhoarebreast-fedmaybemorelikelytobesuccessfulinlife,anewstudypublishedTuesdaysuggests.Thestudyfollowedmorethan3,000babiesintoadulthoodinBrazil.Theresearchersfoundthosewhowerebreast-fedscoredslightlyhigherinintelligencetestsintheir30s,stayedinschoollongerandearnedmoremoneythanthosewhoweregivenformula（配方奶粉）.　　“Breast-feedingnotonlyhasshort-termbenefits,butalsobreast-feedinghaslong-termbenefits,”saysBernardoLessaHortaoftheFederalUniversityofPelotasinBrazil,wholedthestudybeingpublishedinTheLancetGlobalHealth.　　Doctorshavelongknownthatbreast-feedingcanbegoodforababy'shealth.Thisisespeciallytrueinpoorcountries,wherewatercanbecontaminated.Forinstance,ababygivenformulaindevelopingcountriesis14timesmorelikelytodieinthefirstsixmonthsthanonewho'sbreast-fed.IntheU.S.,someresearchhassuggestedthatbreast-feedingmayraiseababy'sIQ（智商）byafewpoints.Butarecentstudywithsiblings（兄弟姐妹）foundlittleadvantagetobreast-feeding.　　Hortasaysthesepreviousstudiesdidn'tfollowchildrenintoadulthoodtoseeifbreast-feedinghadlong-termeffects.SoHortaanalyzeddatacollectedfrom3,493volunteersheandhiscolleagueshavebeenfollowingsincebirth.Theyarenowintheir30s.First,theresearchersgavethesubjectsIQtests.Thosewhowerebreast-fedfor12monthsormorehadIQtestscoresthatwere3.76pointshigherthanthosewhowerebreast-fedforlessthanonemonth,theteamfound.　　WhenHortaandhiscolleagueslookedathowmucheducationthesubjectshadgottenandhowmuchmoneytheyweremaking,theyalsofoundacleardifference:Thosewhowerebreast-fedthelongeststayedinschoolforaboutanextrayearandhadmonthlysalariesthatwereaboutathirdhigher.　　1.Fromthepassage,welearnthatHorta.　　A.isfromBrazil　　B.conductshisresearchintheU.S.　　C.has30researchersonhisteam　　2.Whichofthefollowingaboutthosewhowerebreast-fedisNOTmentioned?　　A.Theystayedlongerinschool　　B.Theywerehappier　　C.Theyweresmarter　　3.WhichofthefollowingisTRUE?　　A.Doctorsdon'tunderstandthebenefitsofbreast-feeding.　　B.Hortaisconcernedwithwatercontaminationinpoorcountries.　　C.Horta'sresearchprojectlastedabout30years　　4.ThewordcontaminatedinParagraph3isclosestinmeaningto.　　A.finished　　B.interested　　C.polluted　　5.Whichofthefollowingisanappropriatetitleforthispassage?　　A.ResearchersHavePointedOuttheDisadvantagesofBreast-feeding　　B.ResearchersHaveFoundOuttheShortcomingsofFormula　　C.Breast-feedingImprovesChancesofSuccess