GWD－6－17

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

答案是A，我选的是D

我排除A的原因是：觉得最后的to serve结构有问题。因为Serve说的就是这个sewer system的作用，应该用serving连接比较正确吧。

还有，如果D的确是错的，那么请大家告诉我D的错误在哪里呢？

这道题目至今没看到过有人讨论。

谢谢！

a中to serve表目的；

d中serving既可以跳跃leading to the construction between 1876 and 1904 of three separate sewer systems 来修饰public health ，也可以就近修饰 sewer systems

一个句子的灵魂是其谓语动词,一般情况下(没有致命错误),都保留谓语动词

D 把 原选项的动词 LED 改成了 were 了,句子中心显然改变

我个人理解而已~~~

there be 句型加concerns不可以，因为是抽象名词 leading to逻辑上修饰的是concerns，D使leading to后面的修饰对象不明确，serving表the construction between 1876 and 1904 of three separate sewer systems 这一动作的目的，而现在分词无法起到该作用。

虽然A里面to serve可理解为一个省略成分（for purpose)to serve

突然发现以前的老贴什么都讨论清楚了... 共享...

http://forum.chasedream.com/dispbbs.asp?BoardID=23&replyID=630855&id=71840&skin=0