[ Passive Voice ]
The theory of relativity ____ by Einstein, who was a famous physicist.
A. was developed
B. developed
C. is developed
D. develops
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Present Tense vs Past TenseGrammar (Adverbs, Prepositions, Prepositional Phrases)Present Perfect, Present Simple, Present ContinuousTime ClausePast Perfect or Past Perfect ContinuousSuffixes (ing-ed) SentencesCountable & Uncountable NounsGrammar - Punctuation of SentencesAsking & Giving AttentionAdjectives (-ed / -ing)Other quiz:
Grammar › ViewPast participle form of TEACH
A. taught
B. thought
C. tough
D. teached
Grammar › View
Do you mind closing the window?
A. Will
B. Could
C. Would