—Who is the man was talking to our English teacher? —Oh! It’s Mr Baker our math teacher.

问题补充：

—Who is the man was talking to our English teacher?

—Oh! It’s Mr Baker, our math teacher.

A. which B. that C. whomB

答案：

(答案→)B

解析：句意：那个和我们英语老师交谈的人是谁?定语从句用来充当句中定语的结构，被修饰的名词叫先行词，连接主从句的是关系词。关系词分：1关系代词：who , whom , whose , which , that。2关系副词：where,when why 等。一般的who 用于指代人的先行词，which 用来指代物的先行词，that既可指认又可指物.该句先行词是man，故选B。