to do做为动作的目的,逻辑主语应该是该动作的主语
在cd上看见别人总结的这个知识点,但是套在这道题里又不对了,主语是concerns,怎么能serve呢,求指点
Concerns about public health led to the construction between 1876 and 1904 of three separate sewer systems to serve metropolitan Boston. A. Concerns about public health led to the construction between 1876 and 1904 of three separate sewer systems to serve
B. Concerns about public health have led to the construction of three separate sewer systems between 1876 and 1904 to serve
C. Concerns about public health have led between 1876 and 1904 to the construction of three separate sewer systems for serving
D. There were concerns about public health leading to the construction between 1876 and 1904 of three separate sewer systems serving
E. There were concerns leading between 1876 and 1904 to the construction of three separate sewer systems for serving
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