---What were you doing when Tom came to see you?
---I had just put on my overcoat and to visit my friends.
A. left
B. was left
C. was leaving
D. had left
网友回答
A. left
B. was left
(答案→)C. was leaving
D. had left
解析：考查动词时态。根据I had just put on my overcoat and to visit my friends可知是我刚刚穿上外套，要去拜访朋友。表示过去将要做某事，leave是表位置转移的词，可以用它的进行时态表将来。所以选C。