[ Vocabulary and Grammar ]
The scientist acted as an ________ during the experiment.
A. observation
B. observe
C. observer
D. observing
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Auxiliary VerbsFuture Continuous, Future Perfect and Future Perfect ContinuousGrammar - Present Perfect TenseJobsNouns, Articles, DeterminersState Verbs and Action VerbsGrammar and EssayAcademic VocabularyAdverbs and Adverbial PhrasesTenses and ConclusionsOther quiz:
Who or Whom › ViewI do not think that we belong in a group with the person (who/whom) has been very rude to us.
A. who
B. whom
Grammar › View
They ____________ to Japan for three weeks
A. been gone
B. have gone
C. had going
Grammar - Be going to › ViewI _______________________________ to wash the car tomorrow morning.
A. will going
B. am going to
C. am going
D. will going to
Present Perfect and Past Simple › View
Past Simple refers to?
A. actions or events in the present
B. action or events in the past
C. action or events in the future