问题
选择题
（2014届江西省重点中学盟校高三第二次联考英语试卷）27. She cared more about her students than her own health. That’s why two years passed _____ she was treated for breast cancer.
A．since
B．before
C．after
D．until
答案
答案：B
本题实际上考察的是固定句式：It is some time before…一段时间以后某事才发生；本句中的Two years passed before she was treated for breast cancer.相当于It was two years before she was treated for breast cancer.句义：与关心自己相比她更关心的是学生，那就是为什么2年以后她采取治疗乳腺癌。故B正确。