Now my classmate is GMAT· Xiaobai. I suggest you go to GMAT-related forums to learn about GMAT-related common sense and see the sharing of cattle people. As a person who has been there, I have to remind you that this is very important. After understanding, you can go to Gray's GMAT forum to download the study materials. Gray also has online courses, and there should be weekend courses in September. Gray said it really well ~