–Do you know the man is running along the street?–Yes.He is our math teacher.A. whoB. whom

问题补充：

–Do you know the man is running along the street?

–Yes.He is our math teacher.

A. who

B. whom

C. which

D. whose

答案：

(答案→)A. who

B. whom

C. which

D. whose

解析：你知道沿着街道跑的那个人是谁吗？是的，他是我们的数学老师。定语从句用来充当句中定语的成分，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。关系代词在从句中作主语、宾语。该句中先行词是人，在从句中做主语，故选A