Set 4: Form, Structure & Sense (Intermediate)
Explanation
PASSAGE
Recent studies show that the telescope's primary mirror, which measures 10 meters in _______ is capable of detecting light from galaxies billions of light-years away.
Which choice completes the text so that it conforms to the conventions of Standard English?
Detailed Answer Explanation
[Variation 1] This question tests your understanding of sentence function and text organization. The relative clause 'which measures 10 meters in diameter' is nonessential. A comma after 'diameter' closes this clause before the main verb 'is capable.' 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 telescope's primary mirror, which measures"
• "is capable of detecting"
Why others are wrong: A (Missing punctuation fails to close the nonessential relative clause.), C (A semicolon is too strong for closing a relative clause.), D (A colon doesn't fit for closing a relative clause.).
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