I had an issue with my latest CAT test and wasn't sure who to talk to. I have taken 4 MGMAT CATs receiving 42, 37, 35, and 45 on the Verbal sections. On the first three CATs my average difficulty for Sentence Correction questions was 700+. On the fourth CAT the average difficulty was only 660. I got 13 out of 13 correct (1 500-600 Lvl, 10 600-700 Lvl, 2 700-800 Lvl). The two 800 level questions appeared early during the exam. Is it possible that I exhausted the difficult SC question bank? It seems unlikely because my Verbal scores were average on the first three exams, and MGMAT has 6 CATs.

I am taking the GMAT in two weeks and need to complete a couple more CAT tests, specifically one this weekend. I don't want to spend time on another MGMAT CAT if my Verbal score is going to be skewed with easier SC questions. Can anyone help?