The data collected by the research team, which _______ three universities, _______ that air quality in the region _______ improved significantly over the past decade.
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Worked Solution
Step 1: Which spans — antecedent is team (singular collective noun); spans (singular) is correct.
Step 2: Data shows — in modern academic usage, data is treated as a singular mass noun; shows is correct.
Step 3: Air quality has improved — air quality is singular; has improved is correct.
Answer: spans / shows / has
Correct answer: spans / shows / has
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