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# The Chicago and Calumet Rivers originally flowed into the

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The Chicago and Calumet Rivers originally flowed into the [#permalink]

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07 Feb 2009, 10:48
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169. The Chicago and Calumet Rivers originally flowed into the St. Lawrence by way of Lake Michigan, but having been redirected by constructing canals so that the water now empties into the Mississippi by way of the Illinois River.
A. Rivers originally flowed into the St. Lawrence by way of Lake Michigan, but having been redirected by constructing
B. Rivers had originally flowed into the St. Lawrence by way of Lake Michigan, but they have been redirected by constructing
C. Rivers, which originally flowed into the St. Lawrence by way of Lake Michigan but have been redirected by the construction of
D. Rivers, originally flowing into the St. Lawrence by way of Lake Michigan, but having been redirected by the construction of
E. Rivers, originally flowing into the St. Lawrence by way of Lake Michigan, have been redirected through the construction of

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07 Feb 2009, 11:54
scthakur wrote:
kman wrote:
169. The Chicago and Calumet Rivers originally flowed into the St. Lawrence by way of Lake Michigan, but having been redirected by constructing canals so that the water now empties into the Mississippi by way of the Illinois River.
A. Rivers originally flowed into the St. Lawrence by way of Lake Michigan, but having been redirected by constructing - "having been" is awkward
B. Rivers had originally flowed into the St. Lawrence by way of Lake Michigan, but they have been redirected by constructing - past perfect and present perfect are not required.
C. Rivers, which originally flowed into the St. Lawrence by way of Lake Michigan but have been redirected by the construction of - "but" is not required
D. Rivers, originally flowing into the St. Lawrence by way of Lake Michigan, but having been redirected by the construction of - "but" is not required
E. Rivers, originally flowing into the St. Lawrence by way of Lake Michigan, have been redirected through the construction of - correct

Hi scthakur, Is it gramatically incorrect to have past perfect and present perfect ? Or is it for brevity that you eliminated B ?

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07 Feb 2009, 12:12
kman wrote:
Hi scthakur, Is it gramatically incorrect to have past perfect and present perfect ? Or is it for brevity that you eliminated B ?

I am not a grammar guru, but logically, I would prefer a simple past + present perfect combination in place of past perfect + present perfect.

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08 Feb 2009, 01:17
for option B, "constructing" looks awkward also

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08 Feb 2009, 05:52
kman wrote:
169. The Chicago and Calumet Rivers originally flowed into the St. Lawrence by way of Lake Michigan, but having been redirected by constructing canals so that the water now empties into the Mississippi by way of the Illinois River.
A. Rivers originally flowed into the St. Lawrence by way of Lake Michigan, but having been redirected by constructing
B. Rivers had originally flowed into the St. Lawrence by way of Lake Michigan, but they have been redirected by constructing
C. Rivers, which originally flowed into the St. Lawrence by way of Lake Michigan but have been redirected by the construction of
D. Rivers, originally flowing into the St. Lawrence by way of Lake Michigan, but having been redirected by the construction of
E. Rivers, originally flowing into the St. Lawrence by way of Lake Michigan, have been redirected through the construction of

Hi mates,

IMO E

A is akward and also present perfect continuos is not needed
B out: past perfect should be "cut" by past simple and not by present perfect
C out: a main verb for rivers is needed
D out: same as in C and also, present perfect continuous sounds akward

OA and Source?

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09 Feb 2009, 09:55
OA is E. Source: GMATPREP SC

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09 Feb 2009, 23:53
Agree with the explanation given by scthakur.
one shld prefer past perfect +simple past instead of past perfect +simple perfect

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Re: SC: Rivers Flowing   [#permalink] 09 Feb 2009, 23:53
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