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标题: [求助]GWD6-17 [打印本页]
作者: fengkunliu 时间: 2006-5-6 17:18
标题: [求助]GWD6-17
Q17:
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
The answer is A, but I chose C, what's the problem?
作者: rosmarine 时间: 2006-5-6 21:02
C时态错,发生在1876到1904的事应该是过去时;between 1876 and 1904位置错,把led to分开不好;for serving不如to serve好,construction的目的是服务于Boston,要用不定式to do表目的。
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