用适当的连接词填空。
Itisknown1.____homeworkisan
importantpartofschoollifeinmostcountries
aroundtheworld.However2.____.homeworkhasagreateducationalvalueisstilladebateamong
teachers.Somethink3.____homeworktakestoomuchtimeawayfromothermoreusefulactivities.Othersseehomeworkasreinforcing（加强)schoollessonssothat4.____studentshavelearnedwillnotbeforgotten.
5.____isoftenignoredinthisdebateistheroleofparentalinvolvement(参与)and6.____ornotthechild’shomeprovidessupportforeffectivehomework.Itwasnotcleartosomepeople7.____parentalinvolvementcaninfluencetheeffectivenessofhomework.Itistrue8.____parentsinlow-incomefamiliesdon'thavethetimetomakehomeworkmoreimportantthanotherthingsorarentabletoaffordacomputeroradditionalbooks.
However9.____onlymiddle-classparentssupporttheirchildren'seducationisquiteobviouslywrong.Notallrichparentsgivethesupporttheyshouldandsomeparentslivinginthepoorestconditionsfindtimeandenergytoinvolvethemselvesintheirchildren’s homework.
