Miss. Gao in the library for three years. But now she is a teacher.A. workedB. has worked

问题补充：

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

答案：

(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。