A few 'bad apples' cheated on the test, and now everyone has to take the test again.
a bad/rotten 'apple' [=an apple that has rotted and cannot be eaten]
Everything in the cupboard was (arranged) 'in apple-pie order'.
(..) Let's reschedule, okay? Hey, Maggie. Um, why is the new kid waving at me? SAMANTHA: I don't know. But if that boy were an apple... ...he'd be a Delicious. MIKE: Oh, God. Gosh, we are all in such great shape. Oh, jeez. (..)2009 17 Again