(3) In 1922, Fleming was trying to figure out how to kill bacteria that caused diseases. (4) He has a cold and his nose is runny. (5) When he picked up a lab dish, some mucus from his nose dripped into it. (6) He seen that the mucus killed the bacteria growing in the dish. (7) By accident, he had made an important discovery
Which sentence incorrectly shifts tense from past to present?
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Sentence 3
Sentence 4
Sentence 5
Sentence 7
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The bacteriologist Alexander Fleming is recalled as one of the brightest minds in the history of science. TIME once called him “a short (5 ft. 7 in.), gentle, retiring Scot with somewhat dreamy blue eyes, fierce white hair and a mulling mind, which, when it moves, moves with the thrust of a cobra.”
But he owed some of his greatest discoveries, at least in part, to his disgusting habits. It was a tendency toward slovenliness, after all, that famously led him to stumble upon the antibiotic properties of penicillin on this day, Sept. 28, in 1928.
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