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mum's the word

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Say nothing about this, it's a secret, as in Mum's the word on tonight's surprise party. This expression dates from about 1700, but mum, meaning “silence,” is much older. In 2 Henry VI (1:2) Shakespeare wrote, “Seal up your lips, and give no words but mum.”

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The verb tenses can be split into which 3 primary categories?

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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