If you always do medium-difficulty questions and get 80% right, you aren’t improving. You’re rehearsing.
They buy a vocabulary book. They memorize "despite vs. although." They take 20 practice tests hoping the answers will eventually stick. Toeic Test Training
The TOEIC is not a test of your best English. It’s a test of your average English under suboptimal conditions. If you always do medium-difficulty questions and get
But when exam day comes, they freeze.