Grammar Quiz
[ Vocabulary ]

An event, condition, or factor that can be changed or controlled in order to study or test a hypothesis in a scientific experiment.

A. field study

B. trials

C. evidence

D. variable

Select your answer:
A  B  C  D  E 


Random Topics:

Modal Verbs for PossibilityAdverb Of PlaceActive and PassiveModals and AdviceDirect Object and Indirect ObjectModals for ObligationGrammar SuffixesIntermediate PrepositionsIdentifying Sentence TypesPassive Voice - Present Continuous

Other quiz:

Past Continuous Tense › View

Someone tried to steal her phone while she … for a railway ticket.

  1. queued
  2. was queuing

Tenses › View

When Bob went to bed last night, he __________ (brush) his teeth.

A. brushes

B. brush

C. had brushed

D. had brush

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