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Choose the meaning of the idiom: once in a blue moon.

Correct answer: B. very rarely

  • A. very frequently
  • B. very rarely
  • C. at night only
  • D. immediately

Explanation

A blue moon is a second full moon in one calendar month, an uncommon event, so the phrase means something that happens very seldom. It is the opposite of every now and then, which suggests moderate frequency. The colour plays no part in the meaning.

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About Idioms and Phrases

Idioms and phrases are fixed groups of words whose meaning may differ from the literal meanings of their individual words. Questions focus on interpreting expressions such as “spill the beans,” selecting suitable idioms for a situation, and distinguishing idioms from ordinary phrases, proverbs and phrasal verbs.

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