8

Set 14: Form, Structure & Sense (Advanced)

Explanation

Answer: A

PASSAGE

The compound's stability under extreme temperatures, combined with its low _______ makes it an ideal candidate for aerospace applications.

Which choice completes the text so that it conforms to the conventions of Standard English?

A. toxicity,✓ Correct
B. toxicity;
C. toxicity:
D. toxicity

Detailed Answer Explanation

This question tests your understanding of sentence function and text organization. The phrase 'combined with its low toxicity' is parenthetical, modifying the compound subject. A comma closes this phrase before the main verb 'makes.' 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 compound's stability...combined with its low"

• "makes it an ideal candidate"

Why others are wrong: B (A semicolon is too strong for closing a parenthetical phrase.), D (Missing punctuation fails to close the parenthetical phrase.), C (A colon doesn't fit for closing a parenthetical phrase.).

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