[求助]GWD-XY4上的一道改错题

Lareina873 · 发表于 2008-10-20 22:13:00

Concerns about public health led to the construction between 1876 and 1904 of three separate sewer systems to serve metropolitan Boston.

Concerns about public health led to the construction between 1876 and 1904 of three separate sewer systems to serve
Concerns about public health have led to the construction of three separate sewer systems between 1876 and 1904 to serve
Concerns about public health have led between 1876 and 1904 to the construction of three separate sewer systems for serving
There were concerns about public health leading to the construction between 1876 and 1904 of three separate sewer systems serving
There were concerns leading between 1876 and 1904 to the construction of three separate sewer systems for serving

正确答案是A 想了半天还是不知道为什么Ｂ会错　　请牛人们指教！

lawrence0707 · 发表于 2008-10-20 22:32:00

是不是时态的问题啊

本贴相关题目 GMATPrep-2008E1-SC-237 | TN-04-SC-17GMATPrep-2008E1-SC-237 |
TN-04-SC-17
TN-06-SC-16
... (DVEY)