GMAT vocabulary Idioms DIFFERENCE-OR from Helen 2018
Taken from MGMAT guide 8 (Chapter 9)
NOTE:
RIGHT: Expressions that the GMAT considers correct.
SUSPECT: Expressions that the GMAT seems to avoid if possible. These expressions are sometimes grammatically correct, but they may be wordy, controversial, or simply less preferred than other form
WRONG: Expressions that the GMAT considers incorrect.