The theory of relativity ____ by Einstein, who was a ... | GrammarQuiz.net

Topics: Passive Voice

The theory of relativity ____ by Einstein, who was a famous physicist.

A. was developed

B. developed

C. is developed

D. develops

Select your answer:

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Tenses Usage Modals - Conditionals - Future Tenses So....that... Such.......that Employment Vocabulary Present Simple and Present Continuous Tenses Modal Adverbs Root Word Perfect and Past Tense Modals in the Past - Speculation and Deduction Gerunds as Objects of Prepositions

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