I'm sorry.I have kept you ()for me so long.A:wait B:waiting
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I''msorry.Ihavekeptyou()formesolong.A:waitB:waitingI''msorry.Ihavekeptyou()formesolong.A:waitB:waiting
I'm sorry.I have kept you ()for me so long.A:wait B:waiting
I'm sorry.I have kept you ()for me so long.A:wait B:waiting
I'm sorry.I have kept you ()for me so long.A:wait B:waiting
B keep sb.doing..让某人一直做某事
不存在keep sbl.do 结构.
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B