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Difficulty: MediumWords in Context: High-Utility Vocabulary

Which choice completes the text with the most logical and precise word or phrase?

Answer:For decades, planetary scientists hypothesized that the rings of Saturn were a permanent fixture of the solar system, dating back billions of years. However, data from recent space missions indicate that the rings are actively losing material and will likely dissipate in a few hundred million years. This suggests that such rings are a temporary 【phenomenon】 rather than a lasting characteristic of giant planets.

Answer

The correct fill-in word is 'phenomenon' (or synonyms like 'occurrence' or 'feature') which logically completes the contrast with 'lasting characteristic'.
The sentence contrasts the temporary nature of Saturn's rings with a 'lasting characteristic.' The term 'phenomenon' (or synonyms like 'occurrence') precisely describes a natural event or fact that is observed, fitting the academic tone and context of planetary science.

Step-by-Step Solution

1
Analyze the context of the sentence containing the blank.
The sentence sets up a contrast between the blank and the phrase 'lasting characteristic of giant planets'. The word must mean an observable fact, event, or structure that is temporary.
Understanding the context helps identify the grammatical role and definition of the missing word.
2
Identify the word that fits this context semantically and grammatically.
The word 'phenomenon' (defined as an observable occurrence or circumstance) fits the context perfectly, acting as a noun that describes the planetary rings.
The correct answer must be grammatically correct and semantically precise.

Key Concept

Identifying a word that fits the context grammatically and semantically, aligning with the sentence's internal logic and contrasting structures.
Estimated Time:1m 0s
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Topics

Words in Context: High-Utility Vocabulary

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