非谓语动词I'm sorry ____ so long,I forgot to tell you in advance

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非谓语动词
I'm sorry ____ so long,I forgot to tell you in advance where I had put my key
A.to keep you wait B.to keep you waiting
　　C.to keep you waited D.to have kept you waiting
这题选D,C为什么是错的?

keep sb doing,让某人一直做某事,就是处于某种状态,完成时一般含有对现在造成一定的影响,看后半句就知道了,而且这种单项选择题选的是最佳选项.

i'm sorry()so long,i forgot to tell you in advance where i h I'm sorry to keep you waiting so long I'm sorry to have kept you waiting so long. I'm sorry to have kept you waiting so long 和i' m sorry to ke I‘m sorry to have you waiting so long for Marcia ,and I’m af I'm sorry to have you waiting so long for Marcia ,and I’m af I'm sorry I have kept you ______ so long. 一道英语动词填空I'm sorry for having you ____________(wait)so long. I’m sorry I haven’t written to you for so long. 英语翻译hi!I am sorry that i haven't written to you in so long,s Could you tell me ____?I'm going to see him ,---Sorry ,I don I'm so sorry to you .