—I need to advertise for a roommate for next term.
— ? Mary is interested.
A. What for
B. Why not
C. So what
D. Why bother
网友回答
A. What for
B. Why not
C. So what
(答案→)D. Why bother
解析：句意：——我需要登广告找个下个学期的合租者。——费那个劲做什么？玛丽对此事感兴趣。Why bother何必多此一举；Why not为什么不；So what那又怎么样呢； What for 为什么。