The Wiley-Aristotle Big Idiom Question Bank 2019 for the GMAT is a definitive resource for those who are struggling with Idioms—a commonly tested Sentence Correction question type on the GMAT. Idioms cannot really be memorized—they have to be absorbed so that they become almost like a reflex action! This is possible only if you practice a large number of GMAT type questions testing you only on Idioms and Usage based errors.