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Bunuel
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probably difficult

Quote:
(A) on account of the compound exhibiting
"exhibiting..." is a present participle phrase, therefore we can rewrite the sentence like so:
Characteristics of silicon nitride have been intensively investigated for many years mainly on account of the compound.
This makes no sense.

Quote:
(B) on account of exhibiting
what is exhibiting? lacks subject

Quote:
(C) because the compound exhibits
looks ok

Quote:
(D) because they exhibit
this one looks tricky because "they" correctly refer to the plural subject "characteristics". But can characteristics exhibit anything? It is more logical for the compound to exhibit characteristics. Can somebody confirm that this is indeed the reason why choice D is wrong?

Quote:
(E) because of the compound exhibiting
same problem with A
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Bunuel
Characteristics of silicon nitride have been intensively investigated for many years mainly on account of the compound exhibiting unique high temperature mechanics and physical properties.

(A) on account of the compound exhibiting
(B) on account of exhibiting
(C) because the compound exhibits
(D) because they exhibit
(E) because of the compound exhibiting



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