问题补充：
---The floor is dirty. Can anyone clean it?
---I do it all the time.
A. Don’t mention it.
B. Why you?
C. Not sure.
D. Not me again.
答案：
A. Don’t mention it.
B. Why you?
C. Not sure.
(答案→)D. Not me again.
解析：Don’t mention it.用于别人道谢时的答语；Why you?问什么你去？Not sure不清楚。句意：--地板脏了，有人能打扫一下吗？--别再让我干了，我一直在干着呢。根据句意故选D。
