[ a, an, the, Zero Article ]
Einstein is known for his theory of ___ relativity.
a. a
b. an
c. the
d. X [Nothing]

Random Topics:
Have as verb and auxiliaryNounsProgressive TenseReported SpeechApologizingGrammar, adverbs of frequency placementAuxiliary and Modal VerbsPast and Present TensesTenses of VerbsPreposition of DirectionOther quiz:
Grammar › ViewThey _______ new apartments right now
A. will build
B. are building
C. are build
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Action vs Linking Verbs/ Verb Phrases › View
Identify the verb or verb phrase:This was a great day!
A. This was
B. was a
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D. was