Set 5: Form, Structure & Sense
Explanation
PASSAGE
Intriguingly, 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?
Detailed Answer Explanation
[Variation 2] 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: B ('Could' implies possibility or past ability, not a general scientific fact.), C ('May' implies permission or possibility, not inability.), D ('Might' implies speculation, but this is a known scientific fact.).