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Mind your own business
Just yesterday I was going over this with a student. Have you heard this before? If someone tells you to mind your business, that means...
Phrasal verb: Act up
To act up = misbehave (for people); not work properly (for machines). "The babysitter was so frustrated since the children acted up all...
Phrasal verb: Back up
To back up = make a "protection" copy to use if there are problems with the original. "When my computer crashed, I lost many of my files....
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