I am sorry to ( ) you waiting so longA.kept B.be keeping C.have keep D.to be kept

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Iamsorryto()youwaitingsolongA.keptB.bekeepingC.havekeepD.tobekeptIamsorryto()youwaitingsolongA.keptB

I am sorry to ( ) you waiting so longA.kept B.be keeping C.have keep D.to be kept
I am sorry to ( ) you waiting so long
A.kept B.be keeping C.have keep D.to be kept

I am sorry to ( ) you waiting so longA.kept B.be keeping C.have keep D.to be kept
这题目没有一个正确答案.
因为“让你等了很长时间”是发生在说“对不起”之前,动词不定式要用完成式,也就是说用to have加过去分词的结构,所以用to have kept.
希望我能帮助你解疑释惑.