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Meaning of “out of the blue” - Learner’s Dictionary

out of the blue

If something happens out of the blue, you did not expect it: One day, completely out of the blue, I received a letter from her.Not expected or planned
(Definition of out of the blue from the Cambridge Learner’s Dictionary © Cambridge University Press)
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There, their and they’re – which one should you use?
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by Liz Walter If you are a learner of English and you are confused about the words there, their and they’re, let me reassure you: many, many people with English as their first language share your problem! You only have to take a look at the ‘comments’ sections on the website of, for example, a popular

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