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Since around 1970, with world population of 3.5 billion, they have dou

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Since around 1970, with world population of 3.5 billion, they have dou  [#permalink]

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New post 10 Jul 2018, 05:17
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Since around 1970, with world population of 3.5 billion, they have doubled it to our current level of over 7 billion in 2012.


A. with world population of 3.5 billion, they have doubled it

B. with a world population of 3.5 billion, doubling it

C. when the world's population was 3.5 billion, doubling it

D. when the world's population was 3.5 billion, it has doubled

E. when the world's population were 3.5 billion, they have doubled it

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Since around 1970, with world population of 3.5 billion, they have dou  [#permalink]

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New post Updated on: 10 Jul 2018, 05:37
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Any expert here, I can’t get what the word ‘our’ preceded.

Originally posted by AlfredNguyen on 10 Jul 2018, 05:31.
Last edited by AlfredNguyen on 10 Jul 2018, 05:37, edited 2 times in total.
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Re: Since around 1970, with world population of 3.5 billion, they have dou  [#permalink]

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New post 10 Jul 2018, 05:31
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Hi Bunuel, please check the underlined part. I guess it should include "it".
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Re: Since around 1970, with world population of 3.5 billion, they have dou  [#permalink]

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New post 10 Jul 2018, 05:36
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Since around 1970, with world population of 3.5 billion, they have dou  [#permalink]

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New post Updated on: 10 Jul 2018, 06:42
+1 for D.

A. with world population of 3.5 billion, they have doubled it --> Incorrect

B. with a world population of 3.5 billion, doubling it --> Incorrect

C. when the world's population was 3.5 billion, doubling it --> Incorrect

D. when the world's population was 3.5 billion, it has doubled --> Correct, 'when' refers to the year 1970, 'was' refers to the population(singular), and 'it' refers to the population(singular)

E. when the world's population were 3.5 billion, they have doubled it --> Incorrect

Hence, D.
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Originally posted by sudarshan22 on 10 Jul 2018, 06:10.
Last edited by sudarshan22 on 10 Jul 2018, 06:42, edited 1 time in total.
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Re: Since around 1970, with world population of 3.5 billion, they have dou  [#permalink]

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New post 10 Jul 2018, 06:40
A) they does not have any antecedent —> incorrect
B) no verb —> incorrect
C) no verb —> incorrect
D) correct
E) same problem as in A —> incorrect


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Re: Since around 1970, with world population of 3.5 billion, they have dou  [#permalink]

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New post 10 Jul 2018, 12:58
A. with world population of 3.5 billion, they have doubled it
who they? wrong pronoun - out

B. with a world population of 3.5 billion, doubling it
modifier doesn't make any sense here, wrong usage - out

C. when the world's population was 3.5 billion, doubling it
modifier doesn't make any sense here, wrong usage - out

D. when the world's population was 3.5 billion, it has doubled
seems logically and grammatically correct - keep it

E. when the world's population were 3.5 billion, they have doubled it
who they? wrong pronoun - out

D is the answer.
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Re: Since around 1970, with world population of 3.5 billion, they have dou  [#permalink]

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New post 10 Jul 2018, 13:03
Since around 1970, with world population of 3.5 billion, they have doubled it to our current level of over 7 billion in 2012.


A. with world population of 3.5 billion, they have doubled it

B. with a world population of 3.5 billion, doubling it --> no main verb

C. when the world's population was 3.5 billion, doubling it --> no main verb

D. when the world's population was 3.5 billion, it has doubled --> correct

E. when the world's population were 3.5 billion, they have doubled it
Re: Since around 1970, with world population of 3.5 billion, they have dou &nbs [#permalink] 10 Jul 2018, 13:03
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