The changes in the city will cost quite a lot, they will save us money in the long run.
A. or
B. since
C. for
D. but
网友回答
A. or
B. since
C. for
(答案→)D. but
解析:本题考查并列连词or、for、but和从属连词的意义和用法。并列连词or通常表示选择关系;for表示因果关系;but表示转折关系;从属连词since表示原因。通过比较前后两个分句意思可知,它们是转折关系。