Grammar Quiz

[ Vocabulary ]

working to discover something

A. detecting

B. detecting

C. vary

D. unobserved

Select your answer:
         


Random Topics:
Noun ClauseIrregular VerbDegrees of ComparisonHow much or How many?Articles & QuantifiersPassive VoiceSo or SuchAdverb of TimePresent Continuous, Present Perfect and Used to

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How to use : Read the question carefully, then select one of the answers button.