I apologize if I you but I assure you that it was unintentional.A. should offend B. were

问题补充：

I apologize if I you, but I assure you that it was unintentional.

A. should offend

B. were to offend

C. had offended

D. offended

答案：

A. should offend

B. were to offend

(答案→)C. had offended

D. offended

解析：考查交错时间的虚拟条件句：句意：如果我冒犯了你，我抱歉，但是我向你保证我不是故意的。本题中的was暗示，事情发生在过去，所以虚拟条件句中的谓语动词应该用表示过去时间的虚拟形式。用过去完成时，选C。

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