河南成教 / 大学英语Ⅱ
正确率：100%
38[单选题]
Unfortunately, when I dropped in, Professor Smith _ _ _ _ _ _ _ _ , so we only had time for a few words.
A.has just left
B.had just left
C.just left
D.was just leaving
Unfortunately, when I dropped in, Professor Smith _ _ _ _ _ _ _ _ , so we only had time for a few words.
参考答案：
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