She got a red bike on her birthday.A. nine B. ninthC. ninethD. the ninth

问题补充：

She got a red bike on her birthday.

A. nine

B. ninth

C. nineth

D. the ninth

答案：

A. nine

(答案→)B. ninth

C. nineth

D. the ninth

解析：考查序数词。一般情况下序数词前面应该有定冠词the,但当前面有物主代词等限定词时，则省略the.