A year has months and December is the month.A. twelve; twelveB. twelfth; twelveC. twelve

问题补充：

A year has months, and December is the month.

A. twelve; twelve

B. twelfth; twelve

C. twelve; twelfth

D. twelfth; twelfth

答案：

A. twelve; twelve

B. twelfth; twelve

(答案→)C. twelve; twelfth

D. twelfth; twelfth

解析：句意：一年又十二个月，十二月是第十二个月份。第一空用基数词twelve“十二个”，第二空用序数词twelfth“第十二个”。故选C。