I'm sorry I-------------(keep)you waiting for such a long time.
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I''msorryI-------------(keep)youwaitingforsuchalongtime.I''msorryI-------------(keep)youwaitingforsuch
I'm sorry I-------------(keep)you waiting for such a long time.
I'm sorry I-------------(keep)you waiting for such a long time.
I'm sorry I-------------(keep)you waiting for such a long time.
过去式kept