[填空题]The improbable chain of events that leads Alexander Fleming 1. ______
to discover penicillin in 1928 is the stuff which scientific myths 2. ______
are made. It was a discovery that would change the course of the history. The active ingredient in that mold, which Fleming
named penicillin, turned to be an infection-fighting agent of 3. ______
enormous potency. When it was finally recognized as what it
was--the efficacious life-saving drug in the world--penicillin 4. ______
would alter forever the treatment of bacterial infections. By the
middle of the century, Fleming’s discovery spawned a huge phar- 5. ______
maceutical industry, churning out synthetic penicillin that would
conquer some of man-kind’s most ancient scourges, including
syphilis, gangrene, and tuberculosis.
When he died a heart attack in 1955, he was mourned by 6. ______
the world and buried as a national hero in the crypt of St. Paul’s<

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