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
网友回答
A. since
(答案→)B. before
C. after
D. until
解析：句意：她关心学生多于自己的健康，这就是为什么两年过去了她才治疗她的乳腺癌。因为在治疗乳腺癌之前过去的两年，所以用before，可以翻译成“才/就”，since“自从”，after“在…后面”，until直到，所以选B。