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Although malaria was once universally believed to have been introduced

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Although malaria was once universally believed to have been introduced  [#permalink]

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Although malaria was once universally believed to have been introduced to Native American populations by 16th-century European explorers, the recent excavation of a 10th-century mass grave of Native American malaria victims has caused many historians to reconsider their chronologies of European incursion into the Americas.


(A) malaria was once universally believed to have been

(B) malaria was at one time universally believed as being

(C) malaria, once universally believed to be

(D) malaria was at one time universally believed as having been

(E) malaria, once universally believed as being

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Although malaria was once universally believed to have been introduced  [#permalink]

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(A) malaria was once universally believed to have been---- quite good ; the use of passive present perfect correctly connotes the context of the introduction ascribed to the 16th century explorers

(B) malaria was at one time universally believed as being--- The present progressive as being adds an unnecessary antithetical twist to the episode. How can 16th century people be seen as currently introducing? In addition one time means numerically just one time and not subsequently.

(C) malaria, once universally believed to be – believed ‘to be introduced’ may also wrongly denote that the disease is perhaps going to be introduced by the ancient travelers now; absurd.

(D) malaria was at one time universally believed as having been – one time is the culprit. -One time- is a numeric that says it was believed just one time and not as a general or infinite belief. Same problem as in B

(E) malaria, once universally believed as being --- The contemporariness of the ‘being’ is the culprit.


600 -700 question? We will take it, though with a picnh of salt since our OG specialist Abdur says so.
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Re: Although malaria was once universally believed to have been introduced  [#permalink]

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New post 17 Sep 2016, 00:34
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although x, y
A B D remains
B has being 99% wrong in GMAT

(A) believed to have been
(D) believed as having been

Idiom believed to
http://magoosh.com/gmat/2011/top-ten-most-common-gmat-idioms/

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Re: Although malaria was once universally believed to have been introduced  [#permalink]

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New post 06 Apr 2018, 05:51
daagh could you pls explain why C is incorrect and A is correct
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Re: Although malaria was once universally believed to have been introduced  [#permalink]

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New post 17 Jan 2019, 01:15
VeritasKarishma : could you please advise on why the usage of 'have' is correct in option A..I had marked option C which is in correct.
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Re: Although malaria was once universally believed to have been introduced  [#permalink]

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New post 27 Mar 2019, 07:20
AbdurRakib wrote:
Although malaria was once universally believed to have been introduced to Native American populations by 16th-century European explorers, the recent excavation of a 10th-century mass grave of Native American malaria victims has caused many historians to reconsider their chronologies of European incursion into the Americas.


(A) malaria was once universally believed to have been

(B) malaria was at one time universally believed as being

(C) malaria, once universally believed to be

(D) malaria was at one time universally believed as having been

(E) malaria, once universally believed as being

Official Explanation:


This sentence is correct as written.

The underlined portion of the sentence contains the present perfect tense have been so make sure this is the proper verb tense. The underlined portion of the sentence also contains the idiom believed to, so check for idiom errors. The sentence describes a former belief (recent excavation...has caused many historians to reconsider), so the past tense believed is correct. This former belief concerned when malaria was first introduced, so the present perfect have been is correct. The idiom believed to is the correct idiom. There appears to be no error in the original sentence, so keep choice A. Because there is no error in the original sentence, there are no obvious repeaters to look for, so evaluate the remaining answer choices individually looking for reasons to eliminate each.

Choice B incorrectly states believed as being. The sentence calls for the present perfect tense, and the idiom structure believed…as is incorrect. Eliminate choice B. Choice C uses believed to be. While believed to is idiomatic, in this case the use of the present tense verb be is not correct. The former belief in this sentence concerns an occurrence in the past, therefore the sentence calls for the present perfect tense. Eliminate choice C. Choice D incorrectly states believed as having been. The sentence calls for the present perfect tense, and the idiom structure believed…as is incorrect. Eliminate choice D. Choice E incorrectly states believed as being The sentence calls for the present perfect tense, and the idiom structure believed…as is incorrect. Eliminate choice E.

Choice A: Correct.

Choice B: No. Believed…being is the wrong verb tense and believed…as is an incorrect idiom. Verb tense; Idiom.

Choice C: No. The present tense verb be is the incorrect tense for this sentence. Verb tense.

Choice D: No. Believed…having been is the wrong verb tense and believed…as is an incorrect idiom. Verb tense; Idiom.

Choice E: No. Believed…being is the wrong verb tense and believed…as is an incorrect idiom. Verb tense; Idiom.

The correct answer is choice A.
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Re: Although malaria was once universally believed to have been introduced   [#permalink] 27 Mar 2019, 07:20
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