Peter, there is someone in the office would like to speak with you.A.WHICH B.WHOM C.WHO

B.whom

there is someone in the office WHOM would like to speak with you.

WHOM replaces the someone, it indicates that someone would like to speak with you.

选C，彼得，在办公室有一个人，他想和你谈谈。
who引导定语从句中中心词是人的时候。整个从句修饰somenone,who又做从句中的主语。who would like to speak with you即somenone would like to speak with you

选B前面有someone不能用which,而先行词在从句中做主语故用whom

C