---I have cleaned the room three times a day. Look, It is a mess again.
--- ! Wait until the children go to bed.
A. How e
B. Why bother
C. So what
D. What for
网友回答
A. How e
(答案→)B. Why bother
C. So what
D. What for
解析：考查交际用语：A. How e怎么回事？ B. Why bother为什么费事？C.So what 那又怎样？ D. What for为什么？句意：--我一天打扫三次房间，看，又脏了？--别费事了！等孩子睡觉吧。选B。