Set 12: Boundaries (Advanced)
Explanation
PASSAGE
The team of scientists _______ working on the project for over three years.
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 subject is 'team' (singular collective noun), not 'scientists.' Use singular 'has been.' Present perfect emphasizes ongoing duration. 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:
• "team (singular)"
• "for over three years (duration)"
Why others are wrong: D ('Were' is plural AND simple past, losing the ongoing aspect.), C ('Are' is plural AND present simple, not matching the duration.), A ('Have been' is plural; doesn't match singular 'team.').
🎯 Keep Practicing!
Master all sections for your best SAT score