Multiple choice Identify the sentence with the correct usage of articles A cow is useful animal. The cow is a useful animal. Cow is a useful animal. The cow is useful animal. A cow is a useful animal. Reveal answer Fill a bubble to check yourself B Correct answer Explanation Cow is being spoken about as a familyand so it should be 'the cow'. The word 'useful' gives you a 'you' sound and so 'a' is used instead of 'an'.