10

Set 6: Form, Structure & Sense

Explanation

Answer: A

PASSAGE

Intriguingly, the phenomenon, first theorized in 1905 but not experimentally confirmed until _______ has since been observed in numerous laboratory settings worldwide.

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

A. 2012,✓ Correct
B. 2012:
C. 2012;
D. 2012

Detailed Answer Explanation

[Variation 2] This question tests your understanding of sentence function and text organization. The parenthetical phrase 'first theorized in 1905 but not experimentally confirmed until 2012' is closed with a comma before the main verb 'has since been observed.' 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 phenomenon, first theorized in 1905 but not experimentally confirmed until"

• "has since been observed"

Why others are wrong: B (A colon doesn't fit for closing a parenthetical phrase.), C (A semicolon is too strong for closing a parenthetical phrase.), D (Missing punctuation fails to close the parenthetical phrase.).

🎉 Set Complete!

You've reviewed all explanations. Ready to try another set?