标题: Prep求教NN [打印本页] 作者: gracewangh 时间: 2010-1-13 21:33 标题: Prep求教NN Concerns about public health led to the construction between 1875 and 1904 of three separate sewer systems to serve metropolitan Boston. A.Concerns about public health led to the construction between 1875 and 1904 of three separate sewer systems to serve B.Concerns about public health led to the construction of three separate sewer systems between 1875 and 1904 to serve C.Concerns about public health have led between 1875 and 1904 to the construction of three separate sewer systems for serving D.There were concerns about public health leading to the construction between 1875 and 1904 of three separate sewer systems serving E.There were concerns leading between 1875 and 1904 to the construction of three separate sewer systems for serving 答案是A，我选了B，觉得挺对的有没有NN帮忙解答阿？不胜感激。。。作者: gracewangh 时间: 2010-1-13 23:35
辛辛苦苦打得阿。。自己顶。。。作者: taner 时间: 2010-1-14 00:11
我也觉得选B~~~