Nanjing is one of capitalin China.A. older; cityB. the older; cityC. oldest; citiesD. the

问题补充：

Nanjing is one of capitalin China.

A. older; city

B. the older; city

C. oldest; cities

D. the oldest; cities

答案：

A. older; city

B. the older; city

C. oldest; cities

D. the oldest; cities

解析：

试题分析: 句意：南京是中国最古老的首都城市之一。 one of之一，后接形容词最高级和名词复数，故答案选D.