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。