Is that the man helped us a lot after the earthquake?A. which B. who C. whom

问题补充：

Is that the man helped us a lot after the earthquake?

A. which B. who C. whom

答案：

解析：考查定语从句及关系代词用法辨析。句中先行词为the man,又因为关系词需要做helped的主语，故选who。注意：用which时，先行词只能是物；而whom只能做宾语。