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____ penicillin kills bacteria was discovered in 1928 by Alexander Fleming.

a.what
b.that
c.who
d.which
e.when

User Shintaroid
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2 Answers

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WHEN penicillin kills bacteria was discovered in 1928 by Alexander Fleming
User Lily Finley
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Answer: e. when

Step-by-step explanation:
User JayUser
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