—I am afraid I can't finish the book within this week.
— .
A. Please go ahead
B. That's all right
C. Not at all
D. Take your time
网友回答
A. Please go ahead
B. That's all right
C. Not at all
(答案→)D. Take your time
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。