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BEFORE ALEXANDER FLEMING DISCOVERED PENICILLIN, MA...
BEFORE ALEXANDER FLEMING DISCOVERED PENICILLIN, MANY PEOPLE DIED _...
DE THI DH2014
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26. Before Alexander Fleming discovered penicillin, many people died ___
A. infected with simple bacteria B. from simple bacterial infections
C. infections were simple bacteria D. infecting of simple bacteria
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26.
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DE THI DH2014