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
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(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。