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12 Jul 2014, 04:51
Kudos
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
80% (01:07) correct
20%
(01:23)
wrong
based on 424
sessions
History
Date
Time
Result
Not Attempted Yet
Authors such as Elizabeth Kolbert were beginning to warn that human activity — greenhouse-gas emissions, urbanization, the global spread of invasive species — were driving Earth toward a “mass extinction” event and something that had occurred only five times since life emerged over 3 billion years ago.
A were driving Earth toward a “mass extinction” event and something that had occurred only five times since life emerged
B were driving Earth toward a “mass extinction” event, something that occurred only five times since life had emerged
C was driving Earth toward a “mass extinction” event and something that had occurred only five times since life emerged
D was driving Earth toward a “mass extinction” event, something that has occurred only five times since life emerged
E was driving Earth toward a “mass extinction” event and something that occurred only five times since life emerged
A were driving Earth toward a “mass extinction” event and something that had occurred only five times since life emerged
B were driving Earth toward a “mass extinction” event, something that occurred only five times since life had emerged
C was driving Earth toward a “mass extinction” event and something that had occurred only five times since life emerged
D was driving Earth toward a “mass extinction” event, something that has occurred only five times since life emerged
E was driving Earth toward a “mass extinction” event and something that occurred only five times since life emerged
12 Jul 2014, 08:00
Kudos
Bookmarks
Authors such as Elizabeth Kolbert were beginning to warn that human activity — greenhouse-gas emissions, urbanization, the global spread of invasive species — were driving Earth toward a “mass extinction” event and something that had occurred only five times since life emerged over 3 billion years ago.
A were driving Earth toward a “mass extinction” event and something that had occurred only five times since life emerged
B were driving Earth toward a “mass extinction” event, something that occurred only five times since life had emerged
In both A and B, we are talking about human activity and so it has to be singular. So, A & B both are ruled out.
C was driving Earth toward a “mass extinction” event and something that had occurred only five times since life emerged
Usage of 'and' is wrong as here, it is supposed to connect two independent clauses. Further, usage of past participle is wrong.
D was driving Earth toward a “mass extinction” event, something that has occurred only five times since life emerged
Comma gives that non-restrictive information about the mass extinction event. Sounds good.
E was driving Earth toward a “mass extinction” event and something that occurred only five times since life emerged
'and' should connect two independent clauses or a list. The usage is wrong in the context. It implies as if, the mass extinction event and 'something' are different.
A were driving Earth toward a “mass extinction” event and something that had occurred only five times since life emerged
B were driving Earth toward a “mass extinction” event, something that occurred only five times since life had emerged
In both A and B, we are talking about human activity and so it has to be singular. So, A & B both are ruled out.
C was driving Earth toward a “mass extinction” event and something that had occurred only five times since life emerged
Usage of 'and' is wrong as here, it is supposed to connect two independent clauses. Further, usage of past participle is wrong.
D was driving Earth toward a “mass extinction” event, something that has occurred only five times since life emerged
Comma gives that non-restrictive information about the mass extinction event. Sounds good.
E was driving Earth toward a “mass extinction” event and something that occurred only five times since life emerged
'and' should connect two independent clauses or a list. The usage is wrong in the context. It implies as if, the mass extinction event and 'something' are different.
General Discussion
06 Aug 2020, 20:31
Kudos
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generis,
Could you explain justification of "has occurred" in option D. Event already occurred in past then why are we using "has occurred" in option D.
Could you explain justification of "has occurred" in option D. Event already occurred in past then why are we using "has occurred" in option D.
