Set 7: Words in Context (Advanced)
Explanation
PASSAGE
Antibiotics are powerful drugs used to treat bacterial infections, but overuse can lead to resistance, making the medication ______ against future illnesses.
Which choice completes the text with the most logical and precise word or phrase?
Detailed Answer Explanation
This question asks for the meaning of a word as used in this specific context. If bacteria become 'resistant' to a drug, the drug no longer works. Therefore, it becomes 'ineffective'. Words can have multiple meanings, and context determines which meaning applies. Read the surrounding sentences carefully. Substitute each answer choice to see which maintains the intended meaning and fits the context. Many vocabulary words have multiple dictionary definitions, but only one fits the context. Use the surrounding sentences as clues. Try substituting each answer choice to see which one preserves the author's intended meaning without changing the sentence's message.
Key Evidence:
• "resistance"
• "drugs ... treat"
Why others are wrong: D (Mandatory means required, which is unrelated to efficacy.), B (Helpful means useful, but resistance makes them not useful.), A (Potent means powerful, which is the opposite of being resisted.).
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