Set 12: Form, Structure & Sense
Explanation
PASSAGE
Scientists have discovered that octopuses have three hearts. Two _______ blood to the gills, while the third pumps it to the rest of the body.
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 subject 'Two' (referring to two hearts) is plural and requires the plural verb 'pump' without the 's.' The simple present describes a general fact. 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:
• "Two _______ blood to the gills"
• "the third pumps"
Why others are wrong: D ('Is pumping' is singular; 'Two' requires plural 'are pumping.'), B ('Has pumped' is singular perfect tense; doesn't match plural subject or general fact context.), A ('Pumps' is singular; 'Two' is plural.).
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