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spring on someone

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Present or make known unexpectedly, as in They sprung the news of their engagement on the family last night. This idiom uses spring in the sense of “make a sudden move.” Mark Twain used it in Tom Sawyer (1876): “Old Mr. Jones is going to try to spring something on the people here tonight.”

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Which of the following nouns has an irregular plural form?
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

How to use spring on someone in a sentence

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