Who sings of the three?A. most beautifulB. most beautifullyC. more beautifulD. more beauti

问题补充：

Who sings of the three?

A. most beautiful

B. most beautifully

C. more beautiful

D. more beautifully

答案：

A. most beautiful

(答案→)B. most beautifully

C. more beautiful

D. more beautifully

解析：句意：这三个人当中，谁唱得最好？结合语境可知本句中表示在多个中进行对比，本句中修饰词修饰动词sing，做状语，故用副词的最高级，选B。