SAT Sentence Completion Practice Question 53: Answer and Explanation

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Question: 53

8. Much work was needed to determine the distances between the atoms, the angles between the chemical bonds, and other ------- features.

A. structural
B. expressive
C. indefinite
D. rational
E. nonexistant

Correct Answer: A

Explanation:

Skill: Understanding the content, form, and function of sentences

Explanation for Correct Answer A :

Choice (A) is correct. "Structural" means physical. If one were to insert this term into the text, the sentence would read "Much work was needed to determine the distances between the atoms, the angles between the chemical bonds, and other structural features." The missing term must be related to the distances and angles mentioned in the sentence. These features are "structural," or physical, characteristics.

Explanation for Incorrect Answer B :

Choice (B) is incorrect. "Expressive" means emotional or sentimental. If one were to insert this term into the text, the sentence would read "Much work was needed to determine the distances between the atoms, the angles between the chemical bonds, and other expressive features." Emotion is unrelated to the other features mentioned in the sentence.

Explanation for Incorrect Answer C :

Choice (C) is incorrect. "Indefinite" means imprecise or vague. If one were to insert this term into the text, the sentence would read "Much work was needed to determine the distances between the atoms, the angles between the chemical bonds, and other indefinite features." Vagueness is not a characteristic of the features mentioned.

Explanation for Incorrect Answer D :

Choice (D) is incorrect. "Rational" means having reason or understanding. If one were to insert this term into the text, the sentence would read "Much work was needed to determine the distances between the atoms, the angles between the chemical bonds, and other rational features." It is somewhat illogical to classify the atomic features mentioned in the sentence as "rational," or reasonable.

Explanation for Incorrect Answer E :

Choice (E) is incorrect. "Nonexistent" means unreal. If one were to insert this term into the text, the sentence would read "Much work was needed to determine the distances between the atoms, the angles between the chemical bonds, and other nonexistent features." Atoms and chemical bonds are microscopic, but it is illogical to claim that they do not exist.

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