---I need to advertise for a roommate for next term.
--- ? Mary is interested.
A. Why bother
B. Why not
C. So what
D. What for
网友回答
(答案→)A. Why bother
B. Why not
C. So what
D. What for
解析：考查交际用语：A. Why bother干吗这么麻烦/不必麻烦了，B. Why not好啊，C. So what那又怎样？D. What for 为什么？句意：--我要打广告找下学期的室友，----干吗这么麻烦/不必麻烦了，Mary有兴趣啊。选A。