[ Vocabulary and Grammar ]
The scientist acted as an ________ during the experiment.
A. observation
B. observe
C. observer
D. observing
Select your answer:
Random Topics:
Past and Past ContinuousGrammar and StructureCompound and Complex SentencesPresent Tense VerbsNoun Phrases and Verb PhrasesPast Perfect and Past Perfect ContinuousActive & PassiveClauses and ConjunctionPrepositions and Adverbs of MovementGrammar - First ConditionalOther quiz:
Present Tenses › ViewIdentify the time expressions commonly used with present simple.
A. always, usually, often, sometimes, rarely, never, every day, on Mondays, once a week, twice a year
B. always late
C. every month
D. on weekends
Grammar › View
They ————— (build) a new bridge to replace the one that had collapse.
A. were bulding
B. was building
C. building
D. build