阅读理解.IwasborninTuckahoe,TalbotCountry,Maryland.Ihavenoaccurate(准确的)knowledgeofmyage,neverhavingseenanyrecordcontainingit.Byfarthelargerpartoftheslavesknowaslittleoftheiragesashorsesknowofth

　　阅读理解. IwasborninTuckahoe,TalbotCountry,Maryland.Ihavenoaccurate(准确的)knowledgeofmyage,

　　neverhavingseenanyrecordcontainingit.Byfarthelargerpartoftheslavesknowaslittleoftheiragesas

　　horsesknowoftheirs,anditisthewishofmostmasterswithinmyknowledgetokeeptheirslavesthus

　　ignorant(不知情的).Idonotrememberhavingevermetaslavewhocouldtellofhisbirthday.Theyseldom

　　comenearertoitthanplanting-time,harvesting,springtime,orautumntime.Alackofinformationconcerning

　　myownwasasourceofunhappinesstomeevenduringchildhood.Thewhitechildrencouldtelltheirages,

　　butIcouldnottell.Whythesamerightoughttobetakenawayfromme!Iwasnotallowedtoaskmymaster

　　aboutit.Heconsideredallsuchquestionsonthepartofaslaveimproperandimpolite.Thenearestestimate

　　(估计)Icanlivemakesmenowbetweentwenty-sevenandtwenty-eightyearsofage.Icometothis,from

　　hearingmymastersay,sometimeduring1835,Iwasaboutseventeenyearsold.Mymotherwasnamed

　　HarrietBailey.ShewasthedaughterofIsaacandBetseyBailey,bothcolored,andquitedark.

　　Myfatherwasawhiteman.Theopinionwasalsowhisperedthatmymasterwasmyfather;butofthe

　　correctnessofthisopinion,IknownothingandIhavenomeanstoknow.MymotherandIwereseparated

　　whenIwasbutaninfant-beforeIknewherasmymother.Itisacommoncustom,inthepartofMaryland

　　fromwhichIranaway,topartchildrenfromtheirmothersataveryearlyage.Frequently,beforethechild

　　hasreacheditstwelfthmonth,itsmotheristakenfromit,andhiredoutonsomefarmaconsiderabledistance

　　off,andthechildisplacedunderthecareofanolderwoman,toooldforfieldlabor.1.Itcanbelearnedfromthetextthat____.[ ]A.theslavesforgottheexacttimewhentheywereborn

　　B.thewriterdidn'tknowwhetherhismasterwashisfather

　　C.thewriterwasabouttwenty-sevenyearsoldin1835

　　D.thewriter'smotherlefthimassoonashewasborn2.Theunderlinedword"it"inParagraphlrefersto____.