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JAMB Use of English 1999 Question 70

Question 70

Idioms and Phrasal Verbs

Fill the gap with the most appropriate option: Some robbers are on the prowl, we must be ________

  1. A.alert
  2. B.at alert
  3. C.on the alert
  4. D.for alert
Show the answer and explanation

Answer: C (on the alert)

Explanation

The idiom is 'on the alert', meaning watchful and ready for danger.