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plural dates

Sep 25 2009   12:59PM GMT

Do plural dates take an apostrophe?



Posted by: Ivy Wigmore
CIO, plural dates, pluralization, decades, grammar, Business writing, Quiz

Which is correct?
The concept of kaizen became better known in the late ______, after the publication of Masaaki’s book, Kaizen: The Key to Japan’s Competitive Success.
a. 1980’s
b. 1980s
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