I had wanted to help you last night but I couldn’t spare any timefor Ian essay that is du

问题补充：

I had wanted to help you last night but I couldn’t spare any time．for Ian essay that is due this morning．

A. wrote

B. had written

C. was writing

D. have written

答案：

A. wrote

B. had written

(答案→)C. was writing

D. have written

解析：考查时态。句意：我昨晚曾想帮助你来着，但是我腾不出时间。因为我正在写一篇今天上午要交的论文。结合语境可知描述的是过去正在进行的动作，故用过去进行时态，选C。