Shanghai is one of in China.A. the big cityB. the bigger citiesC. the biggest citiesD. the

问题补充：

Shanghai is one of in China.

A. the big city

B. the bigger cities

C. the biggest cities

D. the biggest city

答案：

A. the big city

B. the bigger cities

(答案→)C. the biggest cities

D. the biggest city

解析：考查最高级的用法。句意“上海是中国最大的城市之一。”固定句型one of the +最高级 +名词的复数，表示“最......之一。”排除A、B；D项的名词没用复数。故选C。