---I am afraid I can't finish the book within this week.
---______A.Please go aheadB.That's all rightC.Not at allD.Take your time
网友回答
D解析go ahead“继续干吧”；That's all right“没关系；不用谢”；Not at all“别客气，没什么”，对感谢的回答；take one's time“要用多少时间就用多少时间；不着急”。由语境可知，应选D项。