Your speech was heard by a group of judges all of agreed that it was the best one this y

问题补充：

Your speech was heard by a group of judges, all of agreed that it was the best one this year..

A. who

B. whom

C. which

D. them

答案：

A. who

(答案→)B. whom

C. which

D. them

解析：考察定语从句。先行词是judges，是人，whom指代先行词作为of 的宾语，故B正确。句意：你的演讲被一群裁判听了，所有人都同意那是今年最好的一个。