Rewrite the active sentences in the passive.
1. alexander fleming discovered penicillin in 1928.
2. mr. roberts teaches our class on tuesdays.
3. leonardo da vinci designed a helicopter in the 15th century.
4. we keep the laboratory door closed at all times.
5. anna lost all her files when her laptop crashed.
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Rewrite the active sentences in the passive. 1. alexander fleming discovered penicillin in 1928.2. m...
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