Set 17: Form, Structure & Sense

Explanation

Answer: D

PASSAGE

The specimen, which was extensively analyzed, _______ recently.

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

A. discovering

B. were discovered

C. been discovered

D. was discovered✓ Correct

Detailed Answer Explanation

The correct answer is 'was discovered' because of the rule: passive voice agreement.

Why others are wrong: A ('discovering' violates the grammatical rule: passive voice agreement.), B ('were discovered' violates the grammatical rule: passive voice agreement.), C ('been discovered' violates the grammatical rule: passive voice agreement.).