The teacher is much kinder to Tom certainly makes the others very angry.A. who B. whi

问题补充：

The teacher is much kinder to Tom , , certainly, makes the others very angry.

A. who

B. which

C. that

D. what

答案：

A. who

(答案→)B. which

C. that

D. what

解析：考查定语从句。本题中的which指代前面一句话的内容，在后面的句子中做主语。引导的是非限制性定语从句。That不能引导非限制性定语从句，who的先行词只能是人。What不能引导非限制性定语从句。句意：老师对Tom更好，这件事情让其它人很生气。故B正确。