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。