---What were you doing when Tom came to see you?---I had just put on my overcoat and to vi

问题补充：

---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

答案：

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。

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