1

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.

Expert Analysis: To succeed in this question, you must carefully evaluate the evidence provided in the passage. The correct answer choice is supported by specific keywords and logical connections that differentiate it from the distractors. Pay attention to the relationship between the prompt and the provided text context.

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.).