Mary how old are you this gear?. And My parents just had a party for my birthday last mon

问题补充：

Mary, how old are you this gear?

. And My parents just had a party for my birthday last monty.

A. Fifteen, fifteenth

B. Fiveteen, fiveteenth

C. Fifteenth, fifteen

D. Fiveteerth, fiveteen

答案：

(答案→)A. Fifteen, fifteenth

B. Fiveteen, fiveteenth

C. Fifteenth, fifteen

D. Fiveteerth, fiveteen

解析：Fifteen基数词,十五;fifteenth序数词,第十五.句意:玛丽,今年你多大了?——十五岁。上个月我的父母刚为我举行了第十五个生日聚会。结合语境可知选A。