．Unfortunately when I arrived Mary so we only had time for a few words.A. was just lea

问题补充：

．Unfortunately, when I arrived, Mary , so we only had time for a few words.

A. was just leaving

B. just left

C. has just left

D. had just left

答案：

(答案→)A. was just leaving

B. just left

C. has just left

D. had just left

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