4

Set 4: Boundaries

Explanation

Answer: B

PASSAGE

Either the students or the teacher _______ responsible for cleaning the classroom.

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

A. were
B. is✓ Correct
C. are
D. have been

Detailed Answer Explanation

This question tests your understanding of sentence boundaries and punctuation. With 'either...or,' the verb agrees with the closer subject. 'Teacher' is singular and closer, so use 'is.' 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:

• "either...or"

• "teacher (closer, singular)"

Why others are wrong: A ('Were' is plural.), C ('Are' is plural; should agree with closer singular 'teacher.'), D ('Have been' is plural.).