问题补充:
---I have cleaned the room three times a day. Look, It is a mess again.
---! Wait until the children go to bed.
A. How come
B. Why bother
C. So what
D. What for
答案:
A. How come
(答案→)B. Why bother
C. So what
D. What for
解析:考查交际用语:A. How come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。