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Laboratory rats and mice live up to 40 percent longer than

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Re: Laboratory rats and mice live up to 40 percent longer than [#permalink] New post 09 Aug 2014, 05:01
ChrisLele wrote:
Hi,

Let me see if I can clear up any ambiguity :)

Laboratory rats and mice live up to 40 percent longer than usual when fed a diet of at least 30 percent fewer calories than that which they would normally eat, but that otherwise contains all necessary vitamins and nutrients.

(A) of at least 30 percent fewer calories than that which they would normally eat, but that otherwise

Typically 'diet of' is used to describe a specific food, 'a diet of bread and water.'

(B) with at least 30 percent fewer calories than what they would normally eat though otherwise it

What does the 'it' refer to. Also you want not use 'with' to describe the diet, but would instead use the relative pronoun 'that' to connect 'diet' to the relative clause.

(C) that has at least 30 percent fewer of the calories that they would normally eat, but otherwise it

Here the 'diet' is being compared to 'calories.'

(D) that has at least 30 percent fewer calories than they would normally eat but that otherwise

We need the use of 'that' after 'calories' to show that we are comparing 'diet of 30%...' to 'a diet they normally eat.' We use 'that' to take the place of 'diet.'

(E) that has at least 30 percent fewer calories than that which they would normally eat, though that otherwise

CORRECT: Here we are correctly comparing 'diet that has at least 30 percent fewer...' to 'that (diet) which they normally...'


Hi ChrisLele,

Why the use of "with" in option B is incorrect?

Best,
Lucy
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Re: Laboratory rats and mice live up to 40 percent longer than   [#permalink] 09 Aug 2014, 05:01
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