GWD5-17

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

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

   Answer: B

我选B,但答案是A,why?

主要考虑的是between 1876 and 1904 插在the construction of three separate sewer systems 不好

我觉得B好呀，时态两个都对，但是语序A就有问题

我觉得也是 么有明显的时间提示词

但是关于construction的修饰成分位置的问题呢？

以下是引用liaijun_2001在2006-8-18 18:24:00的发言：

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

 

 

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

   Answer: B

我选B,但答案是A,why?

主要考虑的是between 1876 and 1904 插在the construction of three separate sewer systems 不好

我认为A 在这里边是最好的：

B 中的时态用现在完成时本身就是错误的。因为首先1904年都是上个世纪的时间了，怎么能够用完成时？另外，时间修饰成分between 1876 and 1904 放的地方也时有问题，它更近于修饰three separate sewer systems 而不是 construction.给人的理解是 contruction 了 在1876和1904之间的three sewer systems.  错。

A 中时态正确，costruction 是between 1876 and 1904 之间，costruction 的目的用 动词不定式来表示，非常正确。 

强烈支持。

时态优先原则。

GMAT的的答案不是正确的答案，而是相对来说最好的答案。

相比较而言，A比B好。