I prefer A to B 首先,是between 1876 and 1904这个插入语的问题。A、B明显意思不一样,就如前面某位NN所说“A表明的是这个时间建造了这个系统;B表明的是这个系统在这个时间服务于Boston,好像其他时间就不服务了”,所以,B改变了句意。 其次,时态问题。B无需用现在完成时,虽然XDF是有现在完成时的两种用法的说法,且是合理的,但B不属于时间段的现在完成时情况(且一般情况下这个时间段是由from... to ...表示的),这个between ... and...是修饰system的而不是concerns, 谓语动词lead to的施动者是concerns,所以,这个句子只是一个对过去事实的陈述,应该用一般过去时。 open to discuss~
gerry3x 发表于 2004-8-14 20:26
Concerns about public health led to the construction between 1876 and 1904 of three separate sewer s ...
愚见:首先,时态没问题,过去时和完成时都可以,因为并没有明确的时间标志说必须要用哪个时态。
其次,between...and...是时间状语,位置可以相对灵活。如果没有“to serve...”这一段的话,当然放到“of three separate sewer systems”后面更合适。但是为什么要把它放到construction后面呢?是因为"to serve..."要作为定语修饰“three separate sewer systems”,离它越近越好。B选项里面"to serve..."距离"sewer systems"有点远了。
这题最后的split应该是修饰介词短语时可能会产生的修饰对象的指代不清:
construction between 1876 and 1904 of three separate sewer systems to serve
这个表达中每一个修饰都不会产生歧义,between 1876 and 1904修饰construction;of three separate system也只能修饰construction.
construction of three separate sewer systems between 1876 and 1904 to serve
这里的介词短语的修饰会产生歧义,因为between 1876 and 1904既可以修饰construction 也可以修饰system。因此违背了GMAT efficient expression的原则。这类表达在报纸上可能看到,但在GMAT世界则是表达大忌。
OG最后一个句子,可以看出GMAC对修饰成分的放置多么注意:
Rock samples taken (修饰samples)from the remains of(修饰remains) an asteroid about(修饰asteriod) twice the size of the 6-mile-wide asteriod that eradicated (修饰asteriod) the dinosaurs have been dated at 3.47 billion years old and thus are evidence of the earliest known asteriod impact on Earth.
每一后置的定语都是紧跟修饰对象,不敢有一点马虎。
A. Concerns about public health led to the construction between 1876 and 1904 of three separate sewer systems to serve ------------CORRECT
B. Concerns about public health have led to the construction of three separate sewer systems between 1876 and 1904 to serve- Incorrect tense (have led)
C. Concerns about public health have led between 1876 and 1904 to the construction of three separate sewer systems for serving -same problem as B
D. There were concerns about public health leading to the construction between 1876 and 1904 of three separate sewer systems serving (distorts meaning - public health leading to construction?)
E. There were concerns leading between 1876 and 1904 to the construction of three separate sewer systems for serving - (same problem as D)