GWD5-17

Q17:

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: A

我选了B，虽然时态用了have，这一点不好，但是我觉得它的修饰语顺序比A好呀...

A: the construction
                between 1876 and 1904
                of three separate sewer systems to serve

B: the construction of three separate sewer systems
                between 1876 and 1904 to serve

不解....

先明确这个时间段是要修饰construction的，关于修饰的位置要尽量贴近修饰的词语

B 这个时间段首先是做定语为而不是状语，所以不是修饰led，用完成时态没道理，另外between放在system后面不知道是想说什么，system和这个时间段有什么关系，是在这段时间内建成的还是塌了？当然根据信息肯定是修饰construction,为了避免这种修饰的模糊，贴近更好

恩，有道理，谢谢拉~