【题目】My sister ________ my parents and I are proud was admitted to Peking University last autumn.
A. whoB. that
C. of whomD. in whom
在线课程【答案】C
【解析】
考查定语从句。句意：我姐姐去年秋天被北京大学录取了，这让我和我的父母很骄傲。分析句子可知，________ my parents and I are proud为定语从句，修饰先行词my sister，从句中为短语be proud of，故用介词“of+关系代词”的结构，故选C。