Set 7: Boundaries (Advanced)
Explanation
PASSAGE
The old library on campus _______ contains rare books dating back to the 18th century.
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 boundaries and punctuation. The clause 'which was built in 1920' is nonessential information. It requires commas on both sides to properly set it off. To determine the correct answer, examine where complete thoughts begin and end. Look for independent clauses that need proper separation. A period, semicolon, or appropriate conjunction can correctly join or separate these ideas. When analyzing sentence boundaries, pay attention to how ideas flow from one sentence to the next. Correct punctuation ensures clarity and prevents confusion for readers. Review the options carefully to identify which choice creates proper sentence structure.
Key Evidence:
• "nonessential clause"
• "commas on both sides"
Why others are wrong: B (Missing opening comma before 'which.'), D (Missing closing comma after '1920.'), A (Colon after nonessential clause is incorrect; should be comma.).
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