3、yliveonthefloor.A.five;nineB.fifth;nineC.five;ninthD.fifth;ninth【答案】C【解析】戴尔家有五口人,他们住在九楼.根据There are___people in Dale's fanuly. They live on the___floor,可知第一个空表示数量,用基数词five,第二个空是表示几楼,用序数词ninth.故选:C.()5.(2019湖南湘西州)24.一Howhanybooksarethereontheshelf?一Well.Ithinktherearebooks.A.tw
6、___birthday.A.seventyB.theseventyC.theseventiethD.seventieth【答案】D【解析】此处指她的第70个生日,故用序数词,又因为空前有形容词性物主代词her修饰,故序数词前不用定冠词the。()8.(2019哈尔滨市)7. — We'll celebrate the____National Day this year.—That s really exciting。A. seventyB. seventeenC. seventieth【答案】C【解析】表示第几个节日、生日和纪念日需要用序数词。此处