–We ‘ll be back for our school’s anniversary (周年) ceremony .
-I see. That means you’ll have a get-together with your classmates in years .
A. twelve; seven
B. twelfth; seven
C. twelve seventh
D. twelfth; seventh
网友回答
A. twelve; seven
(答案→)B. twelfth; seven
C. twelve seventh
D. twelfth; seventh
解析：基数词和序数词的基本用法，第几周年常用序数词。