1--12 20 30 40 50 60 70 80 90这些基数词和序数词
參考答案:one first
two second
three third
four fourth
five fifth
six sixth
seven seventh
eight eighth
nine ninth
ten tenth
eleven eleventh
twelve twelfth
twenty twentieth
thirty thirtieth
forty fortieth 注意没u
fifty fiftieth
sixty sixtieth
seventy seventieth
eighty eightieth
ninety ninetieth