----We love our capital Beijing one of cities in the world.----So do I. A. more beauti

问题补充：

----We love our capital Beijing, one of cities in the world.

------So do I.

A. more beautiful

B. the most beautiful

C. much more beautiful

D. much beautiful

答案：

A. more beautiful

(答案→)B. the most beautiful

C. much more beautiful

D. much beautiful

解析：句意：我们爱我们的首都，世界上最大的城市之一——北京。结合语境可知本句中表示在多个城市中的对比，故用形容词的最高级作定语，选B。