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Answer: BSet 9: Words in Context (Intermediate)
Explanation
PASSAGE
The cells _____ responded to the treatment within 24 hours of administration.
Which choice completes the text with the most logical and precise word or phrase?
A. never
B. visibly✓ Correct
C. slowly
D. randomly
Detailed Answer Explanation
Choice B is the best answer. "Visibly" is correct because it means "in a way that can be seen." The context clues in the passage indicate that this meaning best completes the sentence logically.
Why others are wrong: A ("Never" means "at no time," which doesn't fit the context.), C ("Slowly" means "not quickly," which doesn't fit the context.), D ("Randomly" means "without pattern," which doesn't fit the context.).