Dorothy was always speaking highly of her role in the play of course made the others u

问题补充：

Dorothy was always speaking highly of her role in the play, ,of course , made the others unhappy.

A. which

B. who

C. this

D. what

答案：

(答案→)A. which

B. who

C. this

D. what

解析：考查定语从句。在定语从句中which指代一句话的内容在句中做主语，引导非限制性定语从句。句意：Dorothy总是高度表扬自己在戏剧中的作用，这件事情大人让其他人不高兴了。故A正确。