2

Set 1: Words in Context (Beginner)

Explanation

Answer: D

PASSAGE

The teacher's _____ explanation helped students understand the complex mathematical concept.

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

A. technical
B. vague
C. lengthy
D. clear✓ Correct

Detailed Answer Explanation

Choice D is the best answer. "Clear" is correct because it means "easy to understand; unambiguous." The context clues in the passage indicate that this meaning best completes the sentence logically.

Why others are wrong: A ("Technical" means "involving specialized knowledge," which doesn't fit the context.), B ("Vague" means "unclear or indefinite," which doesn't fit the context.), C ("Lengthy" means "very long in duration," which doesn't fit the context.).