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ReadyPlayerOne
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In 2000, Joseph found that sodium salt emitted penetrating radiations 27 Jun 2018, 05:58
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C
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Difficulty:

35% (medium)

Question Stats:

59% (01:03) correct 41% (01:21) wrong based on 283 sessions

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In 2000, Joseph found that sodium salt emitted penetrating radiations similar to those which Iron produced only a year earlier with a new technology.

a. similar to those which Iron
b. like those which iron
c. similar to those that iron had
d. similar to them that iron
e. similar to those iron
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C
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ReadyPlayerOne
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In 2000, Joseph found that sodium salt emitted penetrating radiations 27 Jun 2018, 06:04
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In 2000, Joseph found that sodium salt emitted penetrating radiations similar to those which Iron produced only a year earlier with a new technology.

a. similar to those which Iron
b. like those which iron
c. similar to those that iron had
d. similar to them that iron
e. similar to those iron

(If it's mentioned in the question that the iron produced the radiation a year earlier then is it important to add had after Iron to emphasize that it happened in the past.)
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In 2000, Joseph found that sodium salt emitted penetrating radiations 27 Jun 2018, 07:44
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ReadyPlayerOne

hi,

request you to share official explanation of this question. Also will you please share the source of the question?
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gvij2017
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In 2000, Joseph found that sodium salt emitted penetrating radiations 27 Jun 2018, 08:11
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In 2000, Joseph found that sodium salt emitted penetrating radiations similar to those which Iron produced only a year earlier with a new technology.

Bold portion is already time indicator so need of past perfect here. According to my explanation C should not be an answer.

C is most attractive choice if above mentioned rule is circumvented.
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In 2000, Joseph found that sodium salt emitted penetrating radiations 27 Jun 2018, 09:56
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hi ENEM,

request you to share official explanation of this question. Also will you please share the source of the question?[/quote]

Hi,

The official explanation says- to refer to the past incident of the experiment on iron one has to use past participle form, therefore, the answer is Choice C. (Source- Explanation from Barrons. however, I have made this question myself from a similar question in Barrons).
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In 2000, Joseph found that sodium salt emitted penetrating radiations 17 Mar 2019, 22:55
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In between C and E, I choose C because I think "had" draws the proper timeline;however, I didn't get any solid reason to cancel option E.
Any opinion on that?

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In 2000, Joseph found that sodium salt emitted penetrating radiations 16 Jun 2020, 21:53
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In 2000, Joseph found that sodium salt emitted penetrating radiations similar to those which Iron produced only a year earlier with a new technology.

a. similar to those which Iron - ''which'' clauses must be separated from the targeted subjects that it tries to modify by a comma. In (A), we do not have this comma.
b. like those which iron - ''which'' clauses must be separated from the targeted subjects that it tries to modify by a comma. In (B), we do not have this comma. Moreover, we cannot use ''like'' to compare full clauses.
c. similar to those that iron had - has no error. hence, (C) is the right answer choice.
d. similar to them that iron - the pronoun ''them'' does not have a logical antecedent (''them'' is used as a pronoun only for ''people'' or ''living things'' in general)
e. similar to those iron - implies that ''iron is produced with a new technology''. This does not make any sense.
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