Set 9: Form, Structure & Sense (Intermediate)
Explanation
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?
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: D ('Could' implies possibility or past ability, not a general scientific fact.), C ('May' implies permission or possibility, not inability.), A ('Might' implies speculation, but this is a known scientific fact.).
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