Mary is said in the supermarket for 5 years but I don’t know why she resigned last month

问题补充：

Mary is said in the supermarket for 5 years, but I don’t know why she resigned last month.

A. to have been working

B. work

C. to be working

D. to have worked

答案：

A. to have been working

B. work

C. to be working

(答案→)D. to have worked

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