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基数词：表数量序数词：表顺序基变序，有规律。字母结尾t,d,d.其他后边th.th中有例外：八减t,就减e,f代ve,ty变tie基数词和序数词的练习题一、写出下列词的序数词1.one2.two3.six4.five5.nine6.twelve7.eight8.twenty-one二、写出下列单词的基数词1.third2.fourth3.tenth4.twentieth5.nineteenth6.thirty-first_三、根据句子意思填空。1.Children’sDay（儿童节）isontheofJune（六月）.2.Therearemonths（月）inayear(年).3.Teacher’sDay(教师节)isontheofSeptember（九月）.4.Threeplus(加)sixis.四、选择填空。()1.Mycousin’sbirthdayinontheofOctober.A.threeB.firstC.thesecond()2.Whatdateisittoday?It’sofApril.A.twelfthB.the12thC.12th()3.Therearedaysinaweek.A.thesevenB.seventhC.theseventhD.seven()4.Sundayisthedayofaweek.A.oneB.firstC.second()5.Twenty-eightminus(减)sixis.A.thetwenty-secondB.twenty-twoC.twenty-second()6.Fourplus(加)istwelve.A.sevenB.eightC.nine