---I ______ so busily these days that I ______ no time to help you with your housework．---That’s OK．I can do it by myself．A.have been working; haveB.have worked; hadC.am working; will haveD.had been working; had had
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A解析these days表示从过去到目前的一段时间，在此期间一直进行的动作可以用现在完成时或现在完成进行时；“没有时间帮你做家务”则是现在存在的事实。