I’m terribly sorry for you waiting for such a long time.A. having keptB. being keptC. hav

问题补充：

I’m terribly sorry for you waiting for such a long time.

A. having kept

B. being kept

C. having being kept

D. keeping

答案：

(答案→)A. having kept

B. being kept

C. having being kept

D. keeping

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