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Differentiate between ‘a’ and ‘an’ in the sentence: ‘I saw ___ UFO in the sky.’
A. a
B. some
C. an
D. the

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Pronoun Antecedent AgreementVerb FormAdverbs of Frequency & Simple Present TenseArticles and PrepositionsPast simple regular verbsPresent ContinuousVocabulary and Sentence StructureComparatives and SuperlativesAdverb of FrequencyAdjectives or AdverbsOther quiz:
Grammar › View______ stamps and _____ piano are my hobbies.
A. collect/play
B. collecting/playing
C. collected/played
Verb Tenses › View
. What does a perfect verb tense express?
A. Certainty that the action will be completed
B. Ongoing actions only
C. Unfinished actions
D. Actions that will never happen