7

Set 10: Form, Structure & Sense (Advanced)

Explanation

Answer: D

PASSAGE

Black holes are so dense that not even light _______ escape their gravitational pull.

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

A. could
B. might
C. may
D. can✓ Correct

Detailed Answer Explanation

This question tests your understanding of sentence function and text organization. 'Can' expresses ability or capability. The sentence describes a scientific fact about light's inability to escape, making 'can' the appropriate modal verb. 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:

• "are so dense"

• "escape their gravitational pull"

Why others are wrong: A ('Could' implies possibility or past ability, not a general scientific fact.), C ('May' implies permission or possibility, not inability.), B ('Might' implies speculation, but this is a known scientific fact.).

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