Robertisfifteennow.Twoandahalfyearsagohecametothecityandbegantostudyinamiddleschool.Hestudieshardandgetsonwellwithhisclassmates.Andheoftenhelpshisfriendswiththeirlessons.Butashecomesfromavillage,theheadmasterwhowasborninarichfamilyisbadtohimanddoeshisbesttomakeexcusestopunishhim.Theboyknowsitandtakesprecautionsagainst(提防)it.Oneafternoonallthestudentswenttohavelunchandheboughtapieceofbread.Hewasreadingabookunderabigtree,whileadogwasstandingnearhim.Atthatmomenttheheadmastercameoutandsawit.Hebecameangryandsaid,“Don’tyouknowwedon’tletanybodyrear(饲养)dogsintheschool？”“Yes,Ido,sir.”saidtheboy.“Whyhaveyoubroughtyourdogtoschool,then？”“Itisn’tmydog.”“Whyisitfollowingyou,then？”“You’refollowingmenow,sir.”saidtheboy,“Canyousayyouaremine？”
请根据以上短文在改写后短文的空白处填入适当的词，使其完整。
Robertisfifteen.HeisinGrade_______(1)now.Hestudieshardandhisclassmatesare_______(2)tohim.Andheoftenhelpshisfriendsto_______(3)theirlessons.Butashewas_______(4)inafarmerfamily,theheadmasterfroma_______(5)familyisbadtohimanddoes_______(6)hecantopunishhim.Onedayinthe_______(7),allthestudentswent_______(8)lunchandheboughtapieceofbread,readingabookunderatree.Atthemomentadogwasstandingnearhim._______(9)theheadmastersawthis,hewantedto_______(10)him.Buthefailedthatdayagain.
第6个答案是what,能不能填anything？为什么呢？