September is month of the year.A. ninthB. nineC. the nineD. the ninth

问题补充：

September is month of the year.

A. ninth

B. nine

C. the nine

D. the ninth

答案：

A. ninth

B. nine

C. the nine

(答案→)D. the ninth

解析：考查序数词的用法。句意为：“九月是一年中的第九个月份。”强调第九个月，用序数词，序数词前加the。故选D。