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Critical Reading > Sentence Completions

Choose the word or set of words that, when inserted in the sentence, best fits the meaning of the sentence as a whole. 

When, in 1864, a factory established by Alfred Nobel to manufacture nitroglycerin blew up, the scientist discovered that the explosive was as ------- as it was powerful, ------- to detonate without warning.

Answer Choices

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Choice (C) is correct. It makes sense to say that when his factory exploded, Nobel discovered how “volatile,” or unpredictable, nitroglycerin could be; in fact, it was “liable” to, or prone to, detonate unexpectedly.

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