Jim is a boy, and today is his birthday.
A. twelve-years-old, twelve
B. twelve-years-old, twelfth
C. twelve-year-old, twelve
D. twelve-year-old, twelfth
网友回答
A. twelve-years-old, twelve
B. twelve-years-old, twelfth
C. twelve-year-old, twelve
(答案→)D. twelve-year-old, twelfth
解析：定语twelve-year-old，表示十二岁的，而twelfth为序数词，故选答案为D