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Difficulty:
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Question Stats:
88% (01:16) correct
12%
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wrong
based on 921
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The majority of scientists believe that to reduce and stabilize atmospheric concentrations of carbon dioxide, emissions must be cut at the source by fossil fuels that are burned more efficiently and, in some cases, by alternatives such as hydrogen fuel cells that can replace fossil fuels altogether.
(A) fossil fuels that are burned more efficiently and, in some cases, by alternatives such as hydrogen fuel cells that can replace fossil fuels altogether
(B) fossil fuels that are burned more efficiently and, in some cases, those that are replaced altogether with alternatives such as hydrogen fuel cells
(C) burning fossil fuels more efficiently and, in some cases, by replacing fossil fuels altogether with alternatives such as hydrogen fuel cells
(D) more efficiency in the burning of fossil fuels and, in some cases, by alternatives such as hydrogen fuel cells that can replace fossil fuels altogether
(E) the more efficient burning of fossil fuels and, in some cases, by fossil fuels that are replaced altogether with alternatives such as hydrogen fuel cells
(A) fossil fuels that are burned more efficiently and, in some cases, by alternatives such as hydrogen fuel cells that can replace fossil fuels altogether
(B) fossil fuels that are burned more efficiently and, in some cases, those that are replaced altogether with alternatives such as hydrogen fuel cells
(C) burning fossil fuels more efficiently and, in some cases, by replacing fossil fuels altogether with alternatives such as hydrogen fuel cells
(D) more efficiency in the burning of fossil fuels and, in some cases, by alternatives such as hydrogen fuel cells that can replace fossil fuels altogether
(E) the more efficient burning of fossil fuels and, in some cases, by fossil fuels that are replaced altogether with alternatives such as hydrogen fuel cells
05 Sep 2017, 20:40
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This sentence needs a common construction: ‘by + verb-ing’. 'By' is used when you describe the method used to accomplish (HOW) something - exactly what is done in this sentence. The sentence is explaining how the states are going to accomplish the stated goal.
If we say:
You should study daily. By doing so, you will improve consistently.
Or
One can’t become smarter by facing the same challenges every day.
A and B are wrong because emissions can’t be cut by fossil fuels … rather they can be cut by more efficient burning of fossil fuels.
D is not parallel; ‘by more efficiency’ is not parallel to ‘alternatives (fuels)’.
E is not parallel; ‘the more efficient burning’ is not parallel to ‘fossil fuels’.
C is perfectly parallel … by burning || by replacing.
C: correct.
If we say:
You should study daily. By doing so, you will improve consistently.
Or
One can’t become smarter by facing the same challenges every day.
A and B are wrong because emissions can’t be cut by fossil fuels … rather they can be cut by more efficient burning of fossil fuels.
D is not parallel; ‘by more efficiency’ is not parallel to ‘alternatives (fuels)’.
E is not parallel; ‘the more efficient burning’ is not parallel to ‘fossil fuels’.
C is perfectly parallel … by burning || by replacing.
C: correct.
General Discussion
27 Sep 2007, 20:07
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I think (A) is better because there are some errors in (C).
emissions must be cut at the source by burning fossil fuels more efficiently and, in some cases, by replacing fossil fuels altogether with alternatives such as hydrogen fuel cells
Can emissions perform these two actions?
If the subject is something like people, the above sentence makes sense; otherwise, it is dangling.
Ans: (C)
emissions must be cut at the source by burning fossil fuels more efficiently and, in some cases, by replacing fossil fuels altogether with alternatives such as hydrogen fuel cells
Can emissions perform these two actions?
If the subject is something like people, the above sentence makes sense; otherwise, it is dangling.
Ans: (C)
