Question

He sat on his bed looking at his brother, _______ had his arms crossed and looked angry.

A．that

B．whom

C．who

D．which

Answer 1

C

试题分析：通过分析句子结构，可知这是一个主从复合句，其中包含一个非限制性定语从句，that不能用于引导非限制性定语从句，故排除A，关系词在定语从句中作主语，且是人，故用who。
点评：解答这类题，首先要确定从句是什么从句，然后依据相应的语法规则做题。定语从句中关系词的确定，要看它在定语从句中作什么成分。