Q17:
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
答案是A,我選B...主要是因為時態的問題嗎?因為我覺得A中答案between 1876 and 1904放的位置實在選不下去...硬生生將the construction of three seperate sewer systems分離!!大家覺得呢?...