Miss. Gao in the library for three years. But now she is a teacher.
A. worked
B. has worked
C. had worked
D. has been working
网友回答
(答案→)A. worked
B. has worked
C. had worked
D. has been working
解析：本题考查时态。结合题干后半部分“她现在是老师”可知“她在图书馆工作三年”是“现在”之前的事，是 “过去”的事，所以用一般过去时。