The tree created a great hindrance to traffic as it lay across the road.
The answer is: [D]:
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They are often used to combine choppy sentences.
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Conjunctions are often used to combine choppy sentences.
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Note: The questions asks about CONJUNCTIONS —NOT about "contractions".
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Choice "A" is incorrect. They are not used to combine two or more LONG sentences. If sentences are already long, then do not need to be combined with a conjunction.
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Choice: "B" is incorrect. To the contrary, the use of conjunctions actually makes sentences longer.
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Choice "C" is incorrect. To the contrary, the use of conjunctions should be used (appropriately, of course) in essays. The use of "contractions" should not be used in essays or formal writing.
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Choice "D" is correct. They are often used to combine choppy sentences for better reading and engagement.
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Although Mr. White had given in to Mrs. White's pleading to make a second wish on the monkey's paw to bring Herbert back, when he does not return immediately, Mr. White becomes suspicious. ... In an attempt to bring her deceased son back from the grave, she demands that her husband wish for Herbert to come back to life.
1 Repent
2 Excavation/Crude
3Conclusively
4Worship
5gather
6 contemporary
7Remains/rodent
8 lurking
9decimated
10grim
11in the air
12carving