问题
单项选择题
Dorothy was always speaking highly of her role in the play, ______, of course, made the others unhappy.
A. who
B. which
C. this
D. what
答案
参考答案：B
解析： 本题考查的是which引导的非限定性定语从句。which引导的非限定性定语从句来说明前面整个句子的情况。