up on something, be
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Be well informed or up-to-date about something, as in I'm not up on the latest models of cars. [Colloquial]
QUIZ
CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?
There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?
Question 1 of 7
Which sentence is correct?
The American Heritage® Idioms Dictionary
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