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# Because chickens lack teeth, they need another way to break

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Because chickens lack teeth, they need another way to break [#permalink]

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06 Nov 2012, 18:49
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46% (02:16) correct 54% (01:08) wrong based on 263 sessions

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Because chickens lack teeth, they need another way to break apart the food they eat before reaching the stomach, and for this reason, chickens have a gizzard in which stones they swallow are used to grind their food.

A) before reaching the stomach, and for this reason, chickens have a gizzard in which stones they swallow are used to grind their food.
B) before it reaches the stomach, and for this reason, chickens have a gizzard in which stones they have swallowed is used to grind their food.
C) before it reaches the stomach, and for this reason, chickens have a gizzard in which stones they swallow are used to grind their food.
D) before reaching the stomach, and for this reason, chickens have a gizzard in which stones they have swallowed is used to grind their food.
E) before it reaches the stomach, and for this reason, chickens have a gizzard in which stones they have swallowed are used to grind their food.

[Reveal] Spoiler:
This question focuses on verb tense and agreement, as well as general rhetorical construction. In this sentence all of the verbs agree with their subjects. However, the phrase before reaching the stomach does not have a clear subject. It appears to modify they, the chickens, instead of food. The present tense verb swallow should be replaced with the present perfect verb have swallowed in order to indicate that the swallowing occurred before the use of the stones.

A) The phrase before reaching the stomach does not have a clear subject. It appears to modify they, the chickens, instead of food.The present tense verb swallow should be replaced with the present perfect verb have swallowed in order to indicate that the swallowing occurred before the use of the stones.

B) The singular verb is does not agree with the plural subject stones. Is should be in the plural form are.

C) swallow should be in past perfect have swallowed

D) The phrase before reaching the stomach does not have a clear subject. It appears to modify they, the chickens, instead of food. The singular verb is does not agree with the plural noun stones. Is should be in the plural form are.

E) This sentence is correct as is. In this sentence all of the verbs agree with their subjects and are in the correct tenses. The modifying phrases do not allow for any confusion.
[Reveal] Spoiler: OA

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Re: Because chickens lack teeth, they need another way to break [#permalink]

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18 Jan 2014, 22:27
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gorsar wrote:
Why C is wrong?
Can anyone explaine please?

Posted from GMAT ToolKit

Between C & E
C) before it reaches the stomach, and for this reason, chickens have a gizzard in which stones they swallow are used to grind their food.
This option doesn't clearly tell us whether Chickens swallow stones to grind food or Chickens grind food using stones that are previously swallowed.

E) before it reaches the stomach, and for this reason, chickens have a gizzard in which stones they have swallowed are used to grind their food.
Correctly states that the stones, swallowed previously, grind food.
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Re: Because chickens lack teeth, they need another way to break [#permalink]

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20 Jan 2013, 11:55
i have a doubt how the phrase "before reaching the stomach" modifies chicken,in my view the phrase is clearly modifying the "food".
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Re: Because chickens lack teeth, they need another way to break [#permalink]

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20 Jan 2013, 12:10
Hi Pavanapaone, You're absolutely correct, it should modify 'food'.

The fact that it does not clearly do this in A is one of the reasons it is wrong.

Answer E resolves this, (and the other mistakes in the original - as described by the OE in the original post)

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Re: Because chickens lack teeth, they need another way to break [#permalink]

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18 Jan 2014, 21:57
Why C is wrong?
Can anyone explaine please?

Posted from GMAT ToolKit
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Re: Because chickens lack teeth, they need another way to break [#permalink]

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01 Dec 2016, 02:15
Hello from the GMAT Club VerbalBot!

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Re: Because chickens lack teeth, they need another way to break [#permalink]

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04 Dec 2016, 10:07
Advice: those sources that are not specified should be kicked out of the question bank.
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Re: Because chickens lack teeth, they need another way to break [#permalink]

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06 Dec 2016, 01:36
sivasanjeev wrote:
gorsar wrote:
Why C is wrong?
Can anyone explaine please?

Posted from GMAT ToolKit

Between C & E
C) before it reaches the stomach, and for this reason, chickens have a gizzard in which stones they swallow are used to grind their food.
This option doesn't clearly tell us whether Chickens swallow stones to grind food or Chickens grind food using stones that are previously swallowed.

E) before it reaches the stomach, and for this reason, chickens have a gizzard in which stones they have swallowed are used to grind their food.
Correctly states that the stones, swallowed previously, grind food.

many official gmat questions test us the difference between present perfect and simple present. while present simple talk about timeless fact, habit, or status, an action which generally have no time, present perfect talk about time of actions, an action continuing to present or an action which happened in the past but its resuts is relevant to present. we should review the uses of these two tenses in grammar books, but dont study it too far.

back to choice C.
swallowing is not a timeless fact, habit or status . it need a time , so present simple tense is incorrect for "swallow" in C. E is better.

another way of looking problem is sequence which is explained above
this is not official question but good question because it test the point gmat test, difference between present simple and present perfect.
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Re: Because chickens lack teeth, they need another way to break   [#permalink] 06 Dec 2016, 01:36
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# Because chickens lack teeth, they need another way to break

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