The article “an” is used…
A. before using action words.
B. before a singular noun beginning with a vowel sound (a,e,i,o,u)
C. before any noun.
D. before a singular or plural noun, noun is known to the reader.

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Vocabulary and GrammarPresent and Past Simple TensePast Tense (Regular and Irregular)Simple Present and Present Continuous TensesNoun, Adjective, and Adverb ClausesPassive Voice, Question Tag, PrepositionsGrammar - could / could notCollective NounsPresent Continous TenseAcademic VocabularyOther quiz:
Verb Phrase › ViewHe won’t have been sleeping long when you pick him up.
- won’t have been sleeping
- will have been sleeping
- won’t have been sleeping long
Gerunds and Infinitives › View
(Eat) ______ vegetables and (exercise)______ are excellent ways to stay healthy.
A. Eating/to exercise
B. To eat/to exercise
C. Eating/exercising
D. To eat/exercising
Grammar › ViewQuan ho Bac Ninh and don ca tai tu are two forms of _______, which are on the UNESCO World Heritage list.
A. musical instrument
B. landscape complex
C. folk singing
D. crowdfunding
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Which of the following sentences is an example of personification?
A. The waves kissed the shore gently.
B. The cat sat on the mat.
C. The sun is a star.
D. The car is red.
