Set 7: Form, Structure & Sense (Advanced)
Explanation
PASSAGE
The phenomenon, observable only under specific atmospheric _______ has been documented fewer than a dozen times in recorded history.
Which choice completes the text so that it conforms to the conventions of Standard English?
Detailed Answer Explanation
This question tests your understanding of sentence function and text organization. The participial phrase 'observable only under specific atmospheric conditions' is parenthetical. A comma closes this phrase before the main verb 'has been documented.' Each sentence in a well-constructed text serves a specific purpose. Consider what role this sentence plays in the argument: does it introduce, support, contrast, or conclude an idea? Understanding why an author includes specific sentences helps you grasp the overall argument. Each sentence should serve a clear purpose: introducing ideas, providing evidence, acknowledging counterarguments, or drawing conclusions. Identify the role to understand the structure.
Key Evidence:
• "The phenomenon, observable only under"
• "has been documented fewer than a dozen times"
Why others are wrong: D (A colon doesn't fit for closing a participial phrase.), A (A semicolon is too strong for closing a participial phrase.), C (Missing punctuation fails to close the parenthetical phrase.).
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