2

Set 2: Words in Context (Intermediate)

Explanation

Answer: D

PASSAGE

The research team employed _____ methods to ensure the accuracy of their results.

Which choice completes the text with the most logical and precise word or phrase?

A. casual
B. questionable
C. outdated
D. rigorous✓ Correct

Detailed Answer Explanation

Choice D is the best answer. "Rigorous" is correct because it means "extremely thorough and careful." The context clues in the passage indicate that this meaning best completes the sentence logically.

Why others are wrong: A ("Casual" means "relaxed and unconcerned," which doesn't fit the context.), B ("Questionable" means "doubtful," which doesn't fit the context.), C ("Outdated" means "no longer current," which doesn't fit the context.).